RE: Schmoyer Sunquest

[Dave Bell]

Well, Roger, I like looking at both, sometimes?

 

Dave  :{)

 

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Roger
Sent: Tuesday, March 19, 2019 4:38 PM
To: Ian Maddocks ; sundial@uni-koeln.de
Subject: RE: Schmoyer Sunquest

 

Thanks Ian

 

It looks like the real McCoy, a well crafted well crafted Schmoyer Sunquest.

 

I had a look at the Instagram link. The #sundial tag seems to be loosely 
applied. What do silly girls in acrobatic poses have to do with sundials?

Regards,

Roger Bailey

Walking Shadow Designs

N 48.669, W 123.403

 

From: Ian Maddocks  
Sent: March 19, 2019 1:50 PM
To: sundial@uni-koeln.de  
Subject: Schmoyer Sunquest

 

hi

 

In case anyone is interested I have just seen a Schmoyer Sunquest pop up on the 
Instagram feed for a Minneapolis antique shop

https://www.instagram.com/p/BvMcGGClYuA/

Claims to be a Schmoyer made in 1960s

 

Just one of the things seen whilst trawling 
https://www.instagram.com/explore/tags/sundial/

 

regards

 

Ian Maddocks

Chester, UK​

53°11'50"N  2°52'41"W

 

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RE: Frank King

[Dave Bell]

"fully" ?  Sadly understated!

-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Richard
Langley
Sent: Thursday, February 21, 2019 6:14 AM
To: Frank King 
Cc: Sundial List 
Subject: Re: Frank King

I run into that problem all the time concerning GPS and GNSS. Even editors
of technical magazines are often not fully scientifically literate. In the
editorial of a GNSS magazine this month, the editor stated that an asterism
was a group of constellations! :-(

-- Richard Langley


-
| Richard B. LangleyE-mail: l...@unb.ca
|
| Geodetic Research Laboratory  Web: http://gge.unb.ca/
|
| Dept. of Geodesy and Geomatics EngineeringPhone:+1 506 453-5142
|
| University of New Brunswick   Fax:  +1 506 453-4943
|
| Fredericton, N.B., Canada  E3B 5A3
|
|Fredericton?  Where's that?  See: http://www.fredericton.ca/
|

-



> On Feb 21, 2019, at 8:57 AM, Frank King  wrote:
> 
> Dear Willy et al,
> 
> You are quite right...
> 
>> There are two fundamental errors in the article by David Leafe for 
>> the Daily Mail.
> 
> He spent an hour on the telephone to me yesterday evening.  He went 
> through his text about 20 times.  The big problem, for me, was trying 
> to explain the difference between latitude and longitude!
> 
> An even bigger problem was that his Editor kept reminding himthat the 
> text must be something that Daily Mail readers could understand!
> 
> I thought he had got everything right but his Editor must have 
> back-tracked a couple of versions.  No doubt Daily Mail readers will 
> be happy :-)
> 
> Moral: never believe what you read in the newspapers even when it is 
> quoting me.
> 
> Very best wishes
> 
> Frank
> 
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
> 

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RE: easy drawing a vertical sundial

[Dave Bell]

Now, THIS is a really cool device!

I probably won’t buy one, but I really like the idea.

Some reservations about the execution – accuracy/precision, repeatability, 
long-term buildup of erased ink, but hopefully, the developers have those 
issues all worked out (or will by delivery time!)

 

Dave

 

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Th. Taudin 
Chabot
Sent: Wednesday, July 11, 2018 5:47 AM
To: sundial@uni-koeln.de
Subject: easy drawing a vertical sundial

 

Ever wondered how to easy draw a vertical sundial?
Look at:
https://www.indiegogo.com/projects/scribit-turn-your-wall-into-a-wonderwall-design?utm_content=campaigns_one_column1_cta
 

 _source=sailthru_medium=email_campaign=bck-07112018weekly#/
Thibaud



-- 
Th. Taudin Chabot, * tcha...@dds.nl  




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RE: Summer Solstice in Florence

[Dave Bell]

Thanks for the link, Jim!  A lovely spectacle.

On the slightly negative side, it never ceases to amaze (or amuse) me, the 
number of idiots that take flash photos of scenes of light. Same with the 
thousands of puny firefly flickers in the stadiums, serving only to light up 
the heads of the people directly in front of them…

 

Dave

 

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of J. Tallman
Sent: Thursday, June 7, 2018 4:38 AM
To: Sundial Mailing List 
Subject: Summer Solstice in Florence

 

Hello All,

This morning I saw an article online about the upcoming summer solstice that 
may be of interest:

https://www.thelocal.it/20180606/florence-duomo-gnomon-summer-solstice

Get your sundial prototypes ready to test, it won't be long before the special 
moment comes!



Best,

Jim Tallman

www.spectrasundial.com  

www.artisanindustrials.com  

jtall...@artisanindustrials.com  

513-253-5497

This message is being sent remotely as I am currently out of the studio. Please 
excuse any further delay in response.

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RE: From sundial to sundial along a meridian to Cistercian abbeys

[Dave Bell]

The aphorism about the difference between Americans and Europeans probably 
applies equally well to Australians!

 

In the US, 100 years is a long time, while in Europe, 100 miles is a long 
distance!

 

Dave

 

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of 
rodwall1...@gmail.com



About the different Abbeys and sundials. Being there for many hundreds of 
years. Where here in Australia I remember as a child our town became 100 years 
old.

 

Thanks,

 

Roderick Wall.

 
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RE:

[Dave Bell]

How beautifully simple and elegant!
And a great quote from Ferguson:
"The simpler that any machine is, the better it will be allowed to be, by
every man of science."

Dave

-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of
tonylindisun--- via sundial
Sent: Sunday, June 25, 2017 3:02 AM
To: Sundial List Sundial List 
Subject: 

Diese Nachricht wurde eingewickelt um DMARC-kompatibel zu sein. Die
eigentliche Nachricht steht dadurch in einem Anhang.

This message was wrapped to be DMARC compliant. The actual message text is
therefore in an attachment.

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RE: Watches that display EoT

[Dave Bell]

Here are pics of my “watch”!

 

Dave

 

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Dan-George Uza
Sent: Sunday, March 19, 2017 4:02 PM
To: sundial@uni-koeln.de
Subject: Watches that display EoT

 

Hello,

 

Here's an interesting wristwatch from this year that shows the Equation of Time 
in a clever way. "Sex on a wrist!" - to quote a comment.

 

https://www.hodinkee.com/articles/vacheron-constantin-les-cabinotiers-celestia-astronomical-grand-complication-introducing

 

Of course there are many more in this category, all rather untouchable because 
of the price. But could there be one for us mortals? Made in China, perhaps? I 
suppose smartwatch faces already exist for this. But would it be difficult to 
design a mechanical EoT timepiece?

 

Dan Uza

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RE: Watches that display EoT

[Dave Bell]

And only $1M !

 

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Dan-George Uza
Sent: Sunday, March 19, 2017 4:02 PM
To: sundial@uni-koeln.de
Subject: Watches that display EoT

 

Hello,

 

Here's an interesting wristwatch from this year that shows the Equation of Time 
in a clever way. "Sex on a wrist!" - to quote a comment.

 

https://www.hodinkee.com/articles/vacheron-constantin-les-cabinotiers-celestia-astronomical-grand-complication-introducing

 

Of course there are many more in this category, all rather untouchable because 
of the price. But could there be one for us mortals? Made in China, perhaps? I 
suppose smartwatch faces already exist for this. But would it be difficult to 
design a mechanical EoT timepiece?

 

Dan Uza

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RE: A different sort of timekeeping

[Dave Bell]

Possibly related method??

https://www.youtube.com/watch?v=ETz0elhKvkM

 

Dave

 

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Dan-George Uza
Sent: Friday, February 24, 2017 2:51 AM
To: sundial@uni-koeln.de
Subject: A different sort of timekeeping

 

Dear group,

 

Here's an interesting trivia from a German book written by Helga Pohl: "Wenn 
dein Schatten sechzehn Fuss misst, Berenike" (1955).

 

While talking about ancient Chinese timekeeping, she mentions that they used 
water clocks and the shadows of the edges of their homes to tell approximate 
time. However... an entirely different approach involved looking into the eyes 
of cats, a practice that is also shown to be used in 20th century Switzerland 
in a slightly modified form: in the area around Graubunden, shepherds tell time 
by looking into the eyes of their goats. I am completely at a loss about how 
this could possibly work! 

 

 

Dan Uza 

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RE: Why we should reform the Calendar

[Dave Bell]

Hear, hear!!

 

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Dan-George Uza
Sent: Saturday, January 28, 2017 12:38 PM
To: sundial@uni-koeln.de
Subject: Why we should reform the Calendar

 

A bit off topic, but I enjoyed this quite a lot!

 

https://youtu.be/EcMTHr3TqA0

 

Dan

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RE: Looking for minutes and seconds correction for whole year for Equation of Time plaque

[Dave Bell]

Thanks for reminding us of your work, Kevin!

That’s a lovely piece of JavaScrpt!

 

Dave

 

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Kevin Karney
Sent: Friday, January 27, 2017 2:40 AM
To: Kenneth R clark 
Cc: sundial@uni-koeln.de
Subject: Re: Looking for minutes and seconds correction for whole year for 
Equation of Time plaque

 

Hi Ken

I you want to observe how the Equation of Time varies over the years, go to my 
website

http://www.precisedirections.co.uk/Sundials/index.html

 

The second item may be of interest to you. It gives a table of EoTs (including 
the longitude correction for your time zone). And you can choose either a 
single year or a four year cycle.

For the four-year cycle, the average local noon EoT is calculated for each 
calendar date, except 29 Feb, which stands on its own. If you want the EoT 
without the longitude correction, set your longitude to your time zone 
longitude.

 

The calculations used are far more rigorous than needed for gnomonic purposes. 
They use the complete VSOP theory as described by Meeus and the EoT is 
topographical rather than geocentric (which only makes a marginal difference). 

If you use browser (like Chrome) which allows you to see the web-page source, 
you can see the calculations involved. (In Chrome, select View>Developer>View 
Source)

EoTs calculated have an accuracy of +/- .06 secs of time - using US Naval 
Observatory's MICA program as standard.

I think it is interesting to see how the 4-year table changes as one jumps 4 
years into the future...  

 

See the first item on the original page for comments on the calculations

and consider using a "Victorian EOT" table which gives all the information 
needed but in a tenth of the space

 

The Latitude/Longitude finder - using Google Earth is a bit ratty, but seems to 
work for Elizabethtown.

 

Let me know if you have any problems.

 

Best wishes

Kevin

 

 

On 26 Jan 2017, at 00:21, Kenneth R clark  > wrote:

 

I had an error message from AOL Sorry for no subject line and my files were not 
sent.

Let me retry with this account.

 

Hi everyone,

 

 I am working on my Equation of Time plaque for my aluminum cross sundial.  
All the instructions and graphics and EQT will be on an 8 ½” diameter ½” 
aluminum plate.  I do not want to use the standard graph found on many sundials 
but instead a chart for the whole year, mins and secs, to add or subtract total 
correction to get watch time.  I do not have much room for detailed 
instructions.

 

 I looked at difference sources for the chart and would like to verify the 
most accurate times to use the four year leap year cycle for a church at 
40.1526N, 76.6038W.   I have looked at the Solar Noon calculator, Sonne and 
Shadows-(cannot input decimal degrees?)  Are there other sources or spreadsheet 
programs?

 

 I like to convey that sundials are accurate.  I envision that a person 
will wait till the shadow is on a line and the person will know what time it is 
suppose to be even though this type of sundial may not be design for precision.

 

 I made a quick drawing.  There will be some type of sun image at the top 
and a logo at the bottom for the location.  The chart in the center is from 
another project that I did just to see how it would look and if the printing is 
large enough to read.  I would have to change the inputs to standard time for 
the whole year.  I have also attached a picture of the sundial.

 

 I just want to know if I am using the right times and would appreciate any 
comments or suggestions.

 

Thanks very much

 

Ken Clark   

Elizabethtown, 
PA

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RE: Leap Second Quiz Question

[Dave Bell]

Logically, tidal power should slow the Earth's rotation.

Mechanical energy, imparted by the combined gravitation of the Sun and Moon
is converted to electrical energy, then primarily dissipated as heat. Drag
applied to the tidal surge must, to some extent, add drag to the Earth's
rotation.

 

Now, does the extracted energy also slow the Moon's revolution about the
Earth?

 

Dave

 

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of David
Sent: Sunday, January 1, 2017 7:19 AM
To: sundial@uni-koeln.de
Subject: Re: Leap Second Quiz Question

 

On 01/01/2017 12:30, Frank King wrote:

Dear All,
 
I hope you all enjoyed the extra second
in bed this morning and that your alarm
clock didn't go off one second early.
 
Here is an easy question to start off
the New Year...
 
Every Sunday at 08:00 I check the first
stroke of the hour-bell of the University
Clock against a radio-controlled UTC clock.
 
If it is slow I add coins to the tray on
the pendulum.  If it is fast I remove
coins.  My formula for the required
adjustment includes a figure for:
 
Last Week's Gain [LWG]
 
Here are my recent observations:
 
  25 December   clock 0.5 seconds fast
   1 Januaryclock 2.0 seconds fast
 
Is the appropriate figure for LWG:
 
a) 0.5 seconds
b) 1.5 seconds
c) 2.5 seconds
 
Frank
 
Frank H. King
Keeper of the University Clock
Cambridge, U.K.
 
 
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Dear Frank,

Happy New Year! I am sorry to hear that it starts with a problem for you
albeit one of the horological kind, so that removes the pain.

I am somewhat puzzled, too. 

You say:

Every Sunday at 08:00 I check the first stroke of the hour-bell of the
University Clock against a radio-controlled UTC clock. If it is slow I add
coins to the tray on the pendulum. If it is fast I remove coins. 

Does the 'it' at the beginning of your second par. refer to the University
clock?
If so, then if it is slow (i.e. rings after the UTC clock says it should),
then its pendulum is too long (C.G. too low), so needs shortening. So coins
need to be removed, not added. This assumes that the place where you
add/remove the coins is below the current C.G.

As to the main question, between 25/12 and 1/1, the clock appears to have
gained 1.5 s. But the UTC clock has added a second, so the University clock
has gained only 0.5 s so the LWG is 0.5 s. In any case, if the clock has not
been tampered with, it is unlikely that the University clock will have
changed its previous LWG of 0.5 s to 1.5 or even 2.5 s in the space of a
week. So I'll go for 0.5 s as the correct answer.

David.



 

 

 

  _  


 
 

This email has been checked for viruses by Avast antivirus software. 
www.avast.com
  

 

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RE: Sundial Puzzle Corner

[Dave Bell]

Well, my "method" was mostly meant tongue-in-cheek, and based upon the
premise that the ellipse was n a (normal sized) sheet of paper. I'd have to
actually try it, but it seems the approximation in the second fold is no
more critical than the first. Assuming the paper is somewhat translucent,
you should be able to overlay the halves pretty accurately.

I do agree that the geometric method is elegant and gives a much better
result!

Dave

-Original Message-
From: Frank King [mailto:f...@cl.cam.ac.uk] 
Sent: Sunday, October 30, 2016 7:37 AM
To: Dave Bell <db...@thebells.net>; Donald L Snyder <dsny...@wustl.edu>
Cc: 'Frank King' <f...@cl.cam.ac.uk>; sundial@uni-koeln.de
Subject: Re: Sundial Puzzle Corner

Dear Dave and Donald,

This puzzle actually has serious
practical sundial applications
as I shall illustrate.  First:

Good try Dave...

> Personally, I'd fold the paper,
> superimposing the reflected
> half-ellipse, crease it, unfold,
> rotate ~90 degrees and repeat!

Although this is not what I had in
mind, it is undoubtedly a practical
method.  I wonder whether you have
actually tried it?  The clue to the
difficulty lies in the approximation
sign you have wisely written before
the "90"!

A fair proportion of my sundials
are hand-cut into elliptical
slabs of slate.  These days,
some stone-yards will simply
accept the major and minor axes
of the ellipse and, somehow,
(water-jet?) cut a slate which
is a close-to-perfect ellipse.

Almost the first task is to find
the centre and the axes.  Clearly
you cannot fold a slate in half
and the traditional way to proceed
is to put a large sheet of paper
over the slate and crease it down
all round the rim.

You then cut round the crease and
attempt to follow your procedure!

No doubt in practised hands this
can give a good result but I find
that, no matter how carefully I
work, the two axes are invariably
not (quite) at 90 degrees.  

It is quite hopeless to refold the
paper; the folds are too close
together.  You have to start again.
I usually get it to my satisfaction
at second attempt but occasionally
I have had to have three tries.

It is especially hard if the ellipse
is not too far off being a circle,
say 1200mm x 1050mm.

This is a big sheet of paper.  Just
try it for yourself and see the
challenges!

Donald pointed to a link which gives
the answer I was aiming at.  Alas,
although I find the geometry a
delight, the practicalities are
just as challenging as the folding
method!  You can get the axes at
right-angles fairly easily but
you find the "centre" is nearer
one end of the major axis than
the other, ditto the minor axis.

As so often with sundials, the
theory may be elegant and
straightforward but real life has
a way of making implementation a
struggle!

Frank


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RE: Sundial Puzzle Corner

[Dave Bell]

Personally, I'd fold the paper, superimposing the reflected half-ellipse,
crease it, unfold, rotate ~90 degrees and repeat!

Dave

-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Frank King

Ancillary Question:

I hand you a perfect ellipse drawn
on a sheet of paper.  The ellipse is
unornamented.  What is the geometrical
construction required to determine the
axes?

Aren't sundial questions fun?

Frank

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Re: A Strange Rainbow

[Dave Bell]

Typically, this would indicate ice crystals in the upper atmosphere. A normal 
rainbow is formed by water droplets with two internal reflections, so the 
rainbow's light is projected back towards the sun. In this case, the light is 
passed forward through the crystals, at an angle determined by their shape, so 
it appears to be coming from the sun's direction, but offset. 

Dave

Sent from my iPhone

> On Aug 17, 2016, at 7:24 AM, Jackie Jones  wrote:
> 
> Dear Sundial  folk,
>  
> I know this is not really sundial related, but I am sure someone will be able 
> to explain this odd rainbow.  The picture was taken yesterday just before 6pm 
> British Summer Time on a hot sunny day.  Looking west to the low sun, there 
> was a rainbow above it with the ends of it curving upwards.   Below it there 
> was a very faint second one in the same curve.  How does this happen on a dry 
> day; normally the sun is in the opposite direction to the rainbow?
>  
> With best wishes in anticipation of an explanation,
> Jackie
>  
> Jackie Jones
> 50° 50’ 09” N0° 07’ 40” W
>  
> 
> ---
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> 
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RE: Sunsweep sculpture

[Dave Bell]

So, this is the western-most piece of the "arch". Sad that it appears to
have been broken.

Well, if the plane of the arch is oriented E-W, and it's vertical, as it
appears tobe, then the normal to the plane faces North, though no to
Polaris. He equinoctial; sunrises and sunsets would also be due East and
West, so in the plane of the slab.

Dave

-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Steve
Lelievre
Sent: Tuesday, August 16, 2016 5:19 PM
To: Sundial Group 
Subject: Sunsweep sculpture

Hello,

Has anyone encountered the set of sculptures called Sunsweep by David Barr?
It consists of three pieces at sites along the Canada-USA border (Campobello
NB, Point Roberts WA, Lake of the Woods, MI) and together they are meant to
represent a conceptual arch symbolizing friendship between the two nations.
The 3 sites are geographically interesting - they are reachable by land from
the main part of their respective countries only by travelling through the
other country (pene-enclaves).

I was recently at Point Roberts and saw the piece located there.. There is a
plaque indicating that the piece is aligned to the North Star, the equinoxes
and the solstices. I found that the plane of the slab forming the sculpture
is aligned East-West but I could not see anything that matches the other
directions mentioned. Am I missing something? Perhaps the shape causes a
special shadow on the special dates?

You can find photos on the Web, for example at
http://2.bp.blogspot.com/-t9hlFDU5te0/UzWerhh1YLI/mQg/7gPHFqa8TFw/s1
600/Pt+Roberts+Sunsweep.JPG

The outer (upper) curved edge has a curious V profile, with the point of the
V switching from one side of the slab to the other as it progresses over the
length of the curve.  The inner or lower curved edge appears to be
perpendicular to the plan of the slab.  I could not see any markings on the
ground. To me, placement of the ring of stones around the base appears
insignificant.

Any thoughts?

Steve




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Re: Sundial in Risen movie

[Dave Bell]

So true! But it looks more like an iStone 0.90

Dave 

Sent from my iPhone

> On May 6, 2016, at 4:03 PM, Jack Aubert  wrote:
> 
> He looks like he’s texting something on his Iphone.
>  
> From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of John Davis
> Sent: Friday, May 06, 2016 3:32 AM
> To: Dan-George Uza 
> Cc: sundial@uni-koeln.de
> Subject: Re: Sundial in Risen movie
>  
> Hi Dan,
>  
> Well spotted!  However, neither the horizontal sundial nor the hourglass was 
> invented until the Middle Ages. Yet another example of Hollywood making up 
> history!
>  
> John
> 
>  
> Dr J Davis
> Flowton Dials http://www.flowton-dials.co.uk/
> 
> BSS Editor http://sundialsoc.org.uk/publications/the-bss-bulletin/
>  
> 
> On 6 May 2016, at 07:58, Dan-George Uza  wrote:
> 
> Hello,
>  
> I've spotted a horizontal sundial in the new biblical drama film Risen 
> (2016). You can see it in different scenes starting about half an hour into 
> the movie. It's alongside a hourglass on a desk belonging to Roman tribune 
> Clavius, the main character. I'm attaching a screenshot.
>  
> Dan Uza
> 
> ---
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> 
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
> 
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RE: NY Public Library photos online

[Dave Bell]

Well, those links got thoroughly trashed! I'll try again...

And yes, there is a top-level search bar.
Sundial leads to:
http://digitalcollections.nypl.org/search/index?utf8=%E2%9C%93=sund
ial

The third one shown:
http://digitalcollections.nypl.org/items/510d47dc-84c6-a3d9-e040-e00a18064a9
9
looked familiar.

We have the original of it in our Stained Glass dials collection as Dial 30
at:
http://www.advanceassociates.com/Sundials/Stained_Glass/sundials_SGS1.html

And Sundials gives another collection:
http://digitalcollections.nypl.org/search/index?utf8=%E2%9C%93=sund
ials


Dave

-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of
kool...@dickkoolish.com
Sent: Saturday, January 9, 2016 12:00 PM
To: sundial@uni-koeln.de
Subject: NY Public Library photos online

The New York Public Library has put 187,000 pictures online. I don't know if
there is a top level text search, but if you pull up an, image, there is a
text search box at the top of the page. So you can type in "sundial" and see
what images in the collection match.


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RE: NY Public Library photos online

[Dave Bell]

http://www.npr.org/sections/thetwo-way/2016/01/06/462128514/new-york-public-
library-makes-180-000-high-res-images-available-online


-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of
kool...@dickkoolish.com
Sent: Saturday, January 9, 2016 12:00 PM
To: sundial@uni-koeln.de
Subject: NY Public Library photos online

The New York Public Library has put 187,000 pictures online. I don't know if
there is a top level text search, but if you pull up an, image, there is a
text search box at the top of the page. So you can type in "sundial" and see
what images in the collection match.


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RE: NY Public Library photos online

[Dave Bell]

Sorry, that was a 2nd-order link.
Tjos is more direct:
http://www.nypl.org/blog/2016/01/05/share-public-domain-collections


-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of
kool...@dickkoolish.com
Sent: Saturday, January 9, 2016 12:00 PM
To: sundial@uni-koeln.de
Subject: NY Public Library photos online

The New York Public Library has put 187,000 pictures online. I don't know if
there is a top level text search, but if you pull up an, image, there is a
text search box at the top of the page. So you can type in "sundial" and see
what images in the collection match.


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RE: NY Public Library photos online

[Dave Bell]

And yes, there is a top-level search bar.
Sundial leads to
http://digitalcollections.nypl.org/search/index?utf8=%E2%9C%93=sund
ial
The third one shown
http://digitalcollections.nypl.org/items/510d47dc-84c6-a3d9-e040-e00a18064a9
9 looked familiar.
We have the original of it in our Stained Glass dials collection as Dial 30
at:
http://www.advanceassociates.com/Sundials/Stained_Glass/sundials_SGS1.html

Dave

-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of
kool...@dickkoolish.com
Sent: Saturday, January 9, 2016 12:00 PM
To: sundial@uni-koeln.de
Subject: NY Public Library photos online

The New York Public Library has put 187,000 pictures online. I don't know if
there is a top level text search, but if you pull up an, image, there is a
text search box at the top of the page. So you can type in "sundial" and see
what images in the collection match.


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RE: Diamond Fuji

[Dave Bell]

Very nice, Roger!  Perfect location and timing, producing some beautiful shots.

 

Of course, location and timing is what this is all about – somewhere, there is 
a great shot almost every morning and evening.

Randall Munroe of XKCD just posted this last week:  http://xkcd.com/1622/

 

Dave

 

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Roger Bailey
Sent: Monday, January 4, 2016 8:19 PM
To: Dan-George Uza ; sundial@uni-koeln.de
Subject: Re: Diamond Fuji

 

Hi Dan,

 

Our NASS member in Japan, Barry Duell, gave a presentation a few years ago on 
the Fuji Diamond. This inspired me to observe and take pictures from my home of 
sunrise over Mt Baker. This glaciated volcanic peak 10,781 ft or 3286 m high is 
about 100 km across the Salish Sea from my home in "Sidney by the Sea" BC. 
Conditions were perfect on 1 April 2013, clear skies and a solar declination of 
4.6° and sunrise azimuth of 83°. The pictures of this Mt Baker Diamond are here.

 https://picasaweb.google.com/rtbailey101/MtBakerDiamond?authuser=0 

 =Gv1sRgCJCXqrr1qqWyFw=directlink. 

The moonrises here are equally spectacular. 

 

Best Wishes for 2016,

 

Roger Bailey

 

From: Dan-George Uza   

Sent: Monday, January 04, 2016 1:04 PM

To: sundial@uni-koeln.de   

Subject: Diamond Fuji

 

Hello,

 

I saw a news report today about “Diamond Fuji”. When the sun appears to rise or 
set on top of Mount Fuji in Japan it shines like a diamond. 


 

http://newsonjapan.com/html/newsdesk/article/114827.php

 

-- 

Dan 

​ Uza

  _  

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RE: sundial Digest, Vol 120, Issue 9

[Dave Bell]

>From Google Maps:

https://www.google.com/maps/place/Inti%C3%B1an+Solar+Museum/@-0.0018115,-78.
4550982,301m/data=!3m1!1e3!4m6!1m3!3m2!1s0x91d5881ef89bad91:0xb2e1699b00a1a9
b8!2sMiddle+of+the+World!3m1!1s0x:0x9dd499d10a8da244!6m1!1e1

 

Looks like a large educational center!

 

Dave

 

  _  

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of ???

Sent: Wednesday, December 09, 2015 1:32 PM
To: sundial@uni-koeln.de
Subject: Re: sundial Digest, Vol 120, Issue 9

 

Sorry, it is certainly  to the north of Kito.



Среда, 9 декабря 2015, 19:15 +01:00 от sundial-requ...@uni-koeln.de:

Send sundial mailing list submissions to
sundial@uni-koeln.de  

To subscribe or unsubscribe via the World Wide Web, visit
https://lists.uni-koeln.de/mailman/listinfo/sundial
or, via email, send a message with subject or body 'help' to
sundial-requ...@uni-koeln.de
 

You can reach the person managing the list at
sundial-ow...@uni-koeln.de
 

When replying, please edit your Subject line so it is more specific
than "Re: Contents of sundial digest..."


Today's Topics:

   1. longest uninterupted meridian line in the world (Willy Leenders)


--

Message: 1
Date: Wed, 9 Dec 2015 19:15:25 +0100
From: Willy Leenders  >
To: Sundial sundiallist  >
Subject: longest uninterupted meridian line in the world
Message-ID:  >
Content-Type: text/plain; charset="us-ascii"

Hj all,

In a herb garden in Hasselt (Belgium) is a meridian line of 90 meters.
At one end it is enclosed by a analematic sundial.
The meridian line will be extended to 230 meters
Does anyone know a uninterupted meridian line that is longer than 200
meters?
There are plans to propose placing the meridian line in Guinness World
Records.

Willy Leenders
Hasselt in Flanders (Belgium)

Visit my website about the sundials in the province of Limburg (Flanders)
with a section 'worth knowing about sundials' (mostly in Dutch):
http://www.wijzerweb.be



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--

Subject: Digest Footer

___
sundial mailing list
sundial@uni-koeln.de  
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--

End of sundial Digest, Vol 120, Issue 9
***



Алексей Крутяков,

www.analemma.ru
007 (495) 720-24-XII 

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RE: Just the right spot and time!

[Dave Bell]

Yes, the surprise is not so much that it happened, but that the photographer
was there at the one(?) precise date and time.

Like a stopped clock, it’s precisely correct, once each period!

Makes a great picture, regardless.

 

Dave

 

  _  

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Jackie
Jones
Sent: Tuesday, December 01, 2015 4:48 AM
To: 'Dan-George Uza'; sundial@uni-koeln.de
Subject: RE: Just the right spot and time!

 

I would have thought it should be very simple and not a freak.  As long as
the sides of the post are parallel to the paving slabs and the sun is
exactly south (or north if you are in the southern hemisphere), at twice a
year this should be the result.  The dates would depend on the height of the
post.  Although, I think it should work even if it isn’t due south, just
when the sun is directly behind the post and the right height.

Jackie

 

Jackie Jones

50° 50’ 09” N0° 07’ 40” W

 

 

 

 

 

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Dan-George
Uza
Sent: 01 December 2015 11:36
To: sundial@uni-koeln.de
Subject: Just the right spot and time!

 

Hello,

 

This freak shadow alignment is featured on ASAP Science's Facebook page. The
question is how to design something similar. Anybody?

 

Dan Uza

 

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Re: Possible sundial in movie

[Dave Bell]

Beautiful dial and setting, Dick!
But please explain for us:
What's supporting all those turtles?!?

Dave

Sent from my iPhone

> On Oct 1, 2015, at 3:53 AM, kool...@dickkoolish.com wrote:
> 
> Here's an example of a dial with an equitorial band all around.
> 
> http://www.dickkoolish.com/rmk_page/sundials/phillips_andover.html
> 
> 
> 
> 
>> On Mon, Sep 28, 2015 at 3:24 PM, Dan-George Uza 
>> wrote:
>> 
>>> Hello,
>>> 
>>> Tonight I saw the trailer for "The 100-Year-Old Man Who Climbed Out the
>>> Window and Disappeared".
>>> 
>>> https://www.youtube.com/watch?v=P-k7DUQPHfQ
>>> 
>>> After the old man climbs out the window at 0:53 he walks past what
>>> appears
>>> to be a cast iron armillary sundial. However, as the equatorial band
>>> seems
>>> to completely circle the globe I think this piece would not show
>>> time...at
>>> least not around the equinoxes!
>> Sure, some armillaries aren't sundials, but I'm sure that I've seen
>> armillary sundials that had the equatorial band all the way around. IIf
>> the
>> band is of uniform width, then it won't tell time when the sun is
>> *exactly*
>> on the equator, but, even if the declination is the *least bit* non-zero,
>> the gnomon will have a shadow on the hour-band. So I don't suppose that an
>> armillary with an equatorial band would lose more than a few days of
>> time-telling each year.
>> 
>> Besides, maybe the upper part of the equatorial band is narrower than the
>> lower part, as is sometimes the case.
>> 
>> Michael Ossipoff
> 
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> 
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RE: Looking for suggestings on surface treatment of my aluminum cross sundial "Time to Reflect"

[Dave Bell]

I should have added that this is a beautiful dial!

I have long considered one almost exactly like this, if I design my own and
my wife's memorials!

Should we decide instead on cremation, maybe I'll *very permanently* install
it in our yard.

Make it nearly impossible for future homeowners to remove.

 

Dave

 

  _  

From: clar...@aol.com [mailto:clar...@aol.com] 
Sent: Saturday, September 19, 2015 3:34 PM
To: sundial@uni-koeln.de
Subject: Looking for suggestings on surface treatment of my aluminum cross
sundial "Time to Reflect"

 

Hi Everyone,

 

 I am looking for suggestions on different types of surface treatment
that I could do on my aluminum cross sundial besides powder coating and
enamel paint in the lettering.   I could anodize it but I am not sure it
would hold up in the sun.  Would some kind of light acid etching work or
some kind of staining on the aluminum?

 

 Thanks,

 

Ken Clark

Elizabethtown, PA

 

 

The following is my post from Facebook and link.

 

 

Time to Reflect sundial.

 

 This is a sundial that I been working on for over a year.  I designed
this aluminum cross sundial on CORELDRAW which was saved as a DXF file and
converted to SOLIDSWORK program and CNC by Max Machine of Elizabethtown, PA.


 

  I am still looking at different options for the finish.  I have been
thinking of powder coating it blue-green patina like the statue of Liberty.

 

 This is still a work in progress and is mounted over my well pipe for
now.  I still need to fabricate the mounting bracket and will be bolted to
probably an 18 inch diameter concrete base.  I need to find the right
location or church that will accept this sundial.

 

 

Thanks,

Ken Clark

 

https://www.facebook.com/media/set/?set=a.10205271882252638.1073741827.11145
22471=1=0a021f4dfa

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RE: Looking for suggestings on surface treatment of my aluminum cross sundial "Time to Reflect"

[Dave Bell]

I would suggest anodizing!

The best etch for aluminum is not acid, but alkali, and following that by
staining, essential *is* anodizing.

Here's one reference on various finishes:

http://www.saf.com/how-to-specify/how-to-decide-between-anodizing-painting-a
nd-powder-coating/

 

Note, "Anodizing is unaffected by sunlight"

 

Dave

 

  _  

From: clar...@aol.com [mailto:clar...@aol.com] 
Sent: Saturday, September 19, 2015 3:34 PM
To: sundial@uni-koeln.de
Subject: Looking for suggestings on surface treatment of my aluminum cross
sundial "Time to Reflect"

 

Hi Everyone,

 

 I am looking for suggestions on different types of surface treatment
that I could do on my aluminum cross sundial besides powder coating and
enamel paint in the lettering.   I could anodize it but I am not sure it
would hold up in the sun.  Would some kind of light acid etching work or
some kind of staining on the aluminum?

 

 Thanks,

 

Ken Clark

Elizabethtown, PA

 

 

The following is my post from Facebook and link.

 

 

Time to Reflect sundial.

 

 This is a sundial that I been working on for over a year.  I designed
this aluminum cross sundial on CORELDRAW which was saved as a DXF file and
converted to SOLIDSWORK program and CNC by Max Machine of Elizabethtown, PA.


 

  I am still looking at different options for the finish.  I have been
thinking of powder coating it blue-green patina like the statue of Liberty.

 

 This is still a work in progress and is mounted over my well pipe for
now.  I still need to fabricate the mounting bracket and will be bolted to
probably an 18 inch diameter concrete base.  I need to find the right
location or church that will accept this sundial.

 

 

Thanks,

Ken Clark

 

https://www.facebook.com/media/set/?set=a.10205271882252638.1073741827.11145
22471=1=0a021f4dfa

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Re: Antikythera mechanism

[Dave Bell]

Coincidentally, in today's Gizmag:

http://www.gizmag.com/hublot-antikythera-mechanism-first-computer-watch/20517/

Now, you can wear a (subset of) the Antikythera Mechanism...

Dave

Sent from my iPhone

 On Aug 17, 2015, at 3:06 AM, tonylindi...@talktalk.net 
 tonylindi...@talktalk.net wrote:
 
 Hi everyone,
  A few weeks ago I stood in the museum in Athens looking 
 reverently at the actual corroded lump of bronze now known as the Antikythera 
 mechanism and the various reconstructions of what it is thought to have been. 
  My immediate thought was HOW could its secrets have been revealed in 
 sufficient detail to reproduce it with so much certainty.  Having looked at
 
 https://www.youtube.com/watch?v=BoS75-0BRWo  
 
 I feel that I now know the answers and can believe in the outcome.  In 
 particular the suggestion/conclusion as to who actually designed it makes a 
 lot of sense.
 
 The music?, ear-blasting commercials and faulty lip-sync are a small price to 
 pay.
 
 Tony Moss
 ---
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RE: Deltacad

[Dave Bell]

You might check this one out:

http://www.deltacadusersgroup.org/Forums/archive/index.php?thread-158.html

 

And search here:

http://www.deltacadusersgroup.org/macrospage1.html

 

Dave

 

  _  

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Donald
Christensen
Sent: Saturday, June 06, 2015 6:34 PM
To: Sundial mailing list
Subject: Deltacad

 

For years I have been using Autocad. I now want to start Deltacad and in
particular writing macros. I need an example of a macro that will read from
a .csv file

 

Does anyone know where I can get such an example? 


Cheers
Donald Christensen
0423 102 090   
www.sundialsforlearning.com http://www.sundialsforlearning.com/

 
http://content.screencast.com/users/dchristensen777/folders/Default/media/d
641cee8-137c-456d-afc1-334e75526254/logo%20GIRL_SHADOW.gif 

This e-mail is privileged and confidential. If you are not the intended
recipient please delete the message and notify the sender. Un-authorized use
of this email is subject to penalty of law.
So there!



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RE: A Digital Sundial on Instructables

[Dave Bell]

The projection distortion could be somewhat compensated by distorting the
number cutouts, so the early and late hours are comparatively narrower.

Dave

-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Fabio
nonvedolora
Sent: Friday, April 24, 2015 1:49 PM
To: sundial@uni-koeln.de
Subject: Re: A Digital Sundial on Instructables

Hi all

I think it can also work with a square section, so it should be easy to 
laser-cut.

I also think the holes on the other side of every number may become a 
window, with inside frames, to allow a projection with any declination of 
the Sun (a bit more complicated)

The problem may be the projection: the ratio between the size of the holes 
and the distance of the projection may blur it and it could become 
unreadable.

ciao Fabio

Fabio Savian
fabio.sav...@nonvedolora.it
www.nonvedolora.eu
Paderno Dugnano, Milano, Italy
45° 34' 10'' N, 9° 10' 9'' E, GMT+1 (DST +2)

-Messaggio originale- 
From: Richard Mallett
Sent: Friday, April 24, 2015 10:01 PM
To: Robert Kellogg ; sundial@uni-koeln.de
Subject: Re: A Digital Sundial on Instructables

On 24/04/2015 17:00, Robert Kellogg wrote:
 Interesting digital dial.  I must admit I looked at this design about 20 
 years ago.  The author has one 3D moveable drawing of the completed dial. 
 If you look closely on the underside of the gnomon, there are cut-outs of 
 hour numbers that match the obverse side.

 Therefore, this sundial works correctly only two days a year (I'm 
 inferring that the numbers were aligned for the equinox).  Pity that such 
 a beautiful digital dial is nearly useless.  Exactly the same problem with

 Voshart's digital cube (see 

http://gizmodo.com/this-digital-sundial-tracks-the-sun-through-a-laser-cut-1
545753402). 
 This may force me back to the drawing board since I hold US Patent 
 5,596,5533 Jan 21 1997 Digital Sundial.  (See also Scharstein's US 
 Patent 5,590,093 Dec 31. 1996 Digital Sundial.  Dan's patent is earlier,

 but he had to reference my article in NASS' Compendium). A the modern 
 digital world.

 I understand that Apple's digital watches are being delivered to those few

 lucky souls today.
 ---
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At a time when digital watches are hardly ever seen in the shops.

-- 
--
Richard Mallett
Eaton Bray, Dunstable
South Beds. UK

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RE: Reflecting Dials

[Dave Bell]

Carlo, that is a beautiful dial and seriously interesting concept for a
reflecting design! The manufacturing process is very clever, with the laser
and NC machining of the spherical dial face. Perfect for automating the
localization and any customization required.

Is the concave mirror stainless steel? It appears as if your process
measures the focal length after polishing.

Can you customize your design for outside of Europe? I'd be tempted to
enquire about one for California, but I suspect the cost would be outside my
budget. :{)

Dave

-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Helios
Sonnenuhren (Carlo Heller)
Sent: Friday, April 03, 2015 11:18 PM
To: sundial@uni-koeln.de
Subject: Re: Reflecting Dials

Dear Claude,

if you are looking for reflecting dials other then ceiling dials this 
dial may be interesting for you:
http://www.helios-sundials.com/Helios-Sundial-Gallery.html

Kind regards
Carlo



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RE: Solstice alignments at the Taj Mahal

[Dave Bell]

Interesting!

But not too surprising, I think. Perhaps I'm reading too little into this.

Assume the grounds, with waterway and flanking pavilions were laid out N-S
and E-W and symmetrically. Then the only significant point here is that the
Summer Solstice rising and setting points are aligned when seen from that
cross path. Otherwise, *some* point on the central waterway would have to be
the perfect place to stand.

Too bad there isn't a similar point or pavilions for the Winter Solstice!

Dave

-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of
kool...@dickkoolish.com
Sent: Monday, February 02, 2015 8:49 AM
To: sundial@uni-koeln.de
Subject: Solstice alignments at the Taj Mahal

I saw the article today about some solstice alignments
at the Taj Mahal.

http://www.livescience.com/49660-taj-mahal-gardens-align-solstice-sun.html?g
oogle_editors_picks=true


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RE: App for iPad

[Dave Bell]

Tony, it looks like you machined those panels yourself!

A beautiful app, indeed!

 

Dave

 

  _  

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Tony Moss
Sent: Monday, January 12, 2015 2:15 AM
To: sundial@uni-koeln.de
Subject: App for iPad

 

Hi all,
 While restoring lost material on my iPad I searched for an Orrery
app. and discovered   Phaeton .  It is a free application so I almost
didn't bother to download it.  What a mistake that would have been!

If you know about it already then no harm done but, if not, you have an
astronomical treat in store.

Happy New Year!

Tony Moss.

P.S.  The following triviality has nothing whatsoever to do with sundialling
so should be ignored by those who wish it so.  My only defence is that I
have not laughed so much in ages.  Enjoy!

https://www.youtube-nocookie.com/embed/k1bG2EPGmI0?autoplay=1vq=hd720rel=0
showinfo=0start=82end=321

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RE: sundial Digest, 3D Printers

[Dave Bell]

This is known as a Delta printer. The three vertical axis motors each move a
pair of parallel arms that connect to a small triangular platform at the
bottom end of the hanging arms. By controlling the three motors, the
machine can move the platform anywhere in a triangular prism volume. The
extruder is on the center of the platform...

Dave

-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Fabio
nonvedolora

This factory, Wasp, doens't use 3 orthogonal axes x, y, z but an original 
system with three arms, everyone on a vertical axis: 
http://www.wasproject.it/


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RE: huit nuits [SEC=UNOFFICIAL]

[Dave Bell]

That Metafilter link was great! Quite a discussion.

On a different note, even further removed from gnomonics, I was struck by a
similar word coincidence.

In Russian, One is odin (uhdeen)

The Norse shamanic god, Odin, was typically depicted with one eye.

 

Dave

  _  

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Hank de Wit
Sent: Thursday, November 13, 2014 10:43 PM
To: Jos Kint; sundial@uni-koeln.de
Subject: RE: huit nuits [SEC=UNOFFICIAL]

 

Hi Jos,

 

Your interesting question has been asked on the Internet before:   

 
http://ask.metafilter.com/108865/eight-night-ocho-noche-huit-nuit-acht-nacht
-otto-notte-oito-noite

 

It appears (from the above link) that there is no link, apart from the fact
that all these languages are related and the two words coincidentally
sounded similar in the root Indo-European language. As the languages
diverged through sound shifts, both (similar sounding) words changed in
similar ways. 

 

No interesting time related factors at all.

 

Hank, Adelaide, Australia

 

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Jos Kint
Sent: Wednesday, 12 November 2014 6:38 AM
To: sundial@uni-koeln.de
Subject: huit nuits 

 

Dear all,

 

What do you think about the following coincidence :

Eight verus night in English, huit versus nuit in French, ocho versus noche
in Spanish, acht versus nacht in Dutch and in German, otto versus notte in
Italian,  octa versus noctem in Latin, 

what might be the reason that in so many languages eight and night sound so
similar? Might there be some connection with time keeping in the old days?

 

Jos Kint, Belgium

 

 

 

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RE: Theatrical sundial

[Dave Bell]

Answered like a true stage-dresser/set builder!
Often, the simplest methods are overlooked when we try to create an effect.

Dave

-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Peter Mayer
Sent: Thursday, April 03, 2014 4:08 PM

Hi Jackie,

Why not make your dial with a moveable, pseudo-shadow (i.e. a very 
visible, dark strip on the dial face) which you can move/ adjust during 
scene changes to the appropriate hour.  That would possibly get the 
effect you're after without the difficult problems of lighting to which 
others have referred.

best wishes,

Peter



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RE: British Renaissance and sundials

[Dave Bell]

Yes – great presentation! 101, when I viewed it.

 

Question, primarily for those who saw it on BBC TV: What happened to the
music for Spem in Alium?!?

Total choral silence throughout that segment!

 

Dave

 

  _  

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of
rodwall1...@gmail.com
Sent: Saturday, March 22, 2014 3:32 PM
To: Sundial Group
Subject: Re: British Renaissance and sundials

 

Hi Thierry,

 

I didn’t go to BBC iplayer, I went straight to Youtube. I have downloaded a
few good BBC Science shows and I remembered this. Good to remember that BBC
shows maybe on Youtube.

 

I Note that when I viewed the video there was 76 viewers. There are now 96
in the last hour. I wonder how many are from our group? It was only put on
Youtube on the 21 March.

 

Regards,

 

Roderick Wall.

 

From: Thierry van Steenberghe mailto:t...@idp-co.be 
Sent: ‎Sunday‎, ‎23‎ ‎March‎, ‎2014 ‎9‎:‎18‎ ‎AM
To: Rod Wall mailto:rodwall1...@gmail.com 

 

Dear Roderick,

thanks a lot for this, I watched the video with utmost pleasure, especially
after the frustration of seeing the BBC iplayer video being forbidden from
outside UK...

I hope the second part of this excellent broadcast will also be available on
YouTube!

Kindest regards,
Thierry

___

Thierry van Steenberghe
Brussels
___




On 22/03/2014 21:44, rodwall1...@gmail.com wrote: 

It is on Youtube:

 

 https://www.youtube.com/watch?v=OGqgswZ3FJk
https://www.youtube.com/watch?v=OGqgswZ3FJk

 

A good video converter that converts Youtube videos which you can then
download your own personal copy:

 http://world.onlinevideoconverter.com/free-video-converter.aspx
http://world.onlinevideoconverter.com/free-video-converter.aspx#

 

Roderick Wall.

 

 

From: fwsaw...@gmail.com
Sent: ‎Sunday‎, ‎23‎ ‎March‎, ‎2014 ‎6‎:‎26‎ ‎AM
To: araignee mailto:araig...@etesseract.com 
Cc: Sundial Group mailto:sundial@uni-koeln.de 

 

See https://vpnreviewer.com/bestukvpn-com-review for info on bestukvpn which
allows free connection to the BBC iplayer from US accounts.

 

Fred Sawyer

 

On Sat, Mar 22, 2014 at 11:29 AM, araignee araig...@etesseract.com wrote:

Hello,

Thanks for the link.  But in the U.S. we get this message:  Currently BBC
iPlayer TV programmes are available to play in the UK only, but all BBC
iPlayer Radio programmes are available to you.  The mysteries of big
business...

Regards,
David

David Coffeen, Ph.D.
TESSERACT
Box 151
Hastings-on-Hudson, NY 10706
1-914-478-2594
m...@etesseract.com
www.etesseract.com




On Mar 22, 2014, at 4:35 AM, Gabriele Kuhn wrote:


http://www.bbc.co.uk/iplayer/episode/b03yzjy6/A_Very_British_Renaissance_The
_Renaissance_Arrives/
 gabriele.k...@btinternet.com



 On 21 Mar 2014, at 22:06, Douglas Bateman wrote:

 I have just seen an excellent BBC programme called A Very British
Renaissance. The presenter, Dr James Fox, included the painting by Holbein -
The Ambassadors, and gave full credit to Nicholas Kratzner with the
presenter handling Kratzner's personal polyhedral dial. He also conducted an
interview with one of our top dial makers, Joanna Migdal, in her studio.

 I gather not all will be able to see the BBC iPlayer, but worth a try.
Perhaps some clever member could extract the relevant section of the
programme.

 Best wishes, Doug

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RE: Garden planning problem

[Dave Bell]

Your logic is correct; I was confusing the problem with something else.
Now, I can't remember just what that something else was!
What made it harder to visualize is that the range would run from 0 to 1
either way, as the angle changes from 0 to 90 degrees.

I did find a nice little java applet that illustrates the situation:
http://andrewmarsh.com/blog/2010/02/01/cosine-law-and-surface-incidence

Dave

-Original Message-
From: Roger Bailey [mailto:rtbai...@telus.net] 
Sent: Friday, January 03, 2014 8:41 PM
To: David Bell
Cc: Marcelo; Sundial List
Subject: Re: Garden planning problem

Hi Dave,

My initial recollection was of a cosine effect. So I drew a little sketch to

clarify the situation. I specified the angle as the elevation, the altitude 
measured from the horizontal. It would be the cosine for the angle measured 
from the zenith. The area of the direct projection is Pi R squared. The area

of the ellipse on the projected on the ground is Pi R times the semi-major 
axis. This is R/ Sin Alt so the area is Pi R squared/Sin Alt. I considered 
the illumination inversely proportional to the area so directly related to 
the sine of the elevation, the altitude angle.  QED. or is my logic wrong?

At sunrise the elevation is zero, sine =0, the intensity is zero. Directly 
above the elevation is 90° and Sine 90 = 1. The intensity is full, 
undiminished by spreading over a larger area. Radiation from the sun follows

the inverse square law. Twice the distance from the sun gets 1/4 the 
intensity but that is not the effect being discussed in this gray posting.

Regards, Roger

--
From: David Bell db...@thebells.net
Sent: Friday, January 03, 2014 2:06 PM
To: Roger Bailey rtbai...@telus.net
Cc: Marcelo mmanil...@gmail.com; Sundial List sundial@uni-koeln.de
Subject: Re: Garden planning problem

 One thought on that gray posting, Roger:
 I may remember incorrectly, but I thought illuminance on a surface was 
 proportional to the square of the cosine of the incidence angle.

 Dave

 Sent from my iPhone

 On Jan 2, 2014, at 8:07 PM, Roger Bailey rtbai...@telus.net wrote:

 Hello Marcelo,

 Many on this list empathize with your problem. We know what we want to do

 but the math is unfamiliar. In reality the trigonometry here is very 
 simple, as you have laid out the problem.  The ratio of the height of the

 shadow caster, G to the shadow length, L is the Tangent of the altitude, 
 H.  Tan H = G/L. Or rearranging  L = G/Tan H. The shadow length is equal 
 to the height of the shadow caster divided by a simple number. the 
 Tangent of the solar altitude angle H.

 This assumes you know the altitude angle. At solar noon when the sun is 
 on the meridian, this is an easy calculation as  the Noon altitude equals

 the co-latitude minus the solar declination  or  H = 90-Lat-Dec.

 This assumes you know your latitude and solar declination. Latitude is 
 easy from maps, websites, GPS etc. Solar declination is not as quite as 
 easy but many tables, almanacs, programs and websites can give it to you.

 Google solar declination.

 What if it is not noon? The altitude and azimuth are still relatively 
 easy to calculate using the classical formulae of spherical trigonometry 
 used by navigators with sextants. Sin Sin Sin Cos Cos Cos is the first 
 equation to know. Sin H = Sin Dec x Sin Lat + Cos Dec x Cos Lat x Cos t. 
 Input your latitude, declination and time as an angle from noon to 
 calculate H, the altitude angle that determines the shadow length.  These

 intimidating trig expressions are just numbers, simple numbers that you 
 can add, subtract, multiply and divide.

 But have you considered the Sine effect of the incident light? Light 
 straight down on a surface such as a flowers leaves is fully effective. 
 As the angle tilts from straight down to a lower angle, the effective 
 incident light is diminishes. How  much? By the Sine  of the altitude. 
 Straight on the altitude is 90° and Sin 90° = 1. At altitude = 45°,  Sin 
 45 = 0.707, so the light is 70% as intense. At 30° altitude, the 
 intensity is halved as Sin 30 = 0.5.

 Many on this mailing list have found the a little geometry, trigonometry 
 and even spherical tri can be very useful in solving problems like yours.

 Regards, Roger Bailey
 --
 From: Marcelo mmanil...@gmail.com
 Sent: Thursday, January 02, 2014 11:37 AM
 To: Sundial List sundial@uni-koeln.de
 Subject: Garden planning problem

 Hello fellow dialists, how are you?
 I'm with a problem here which doesn't concern exactly to sundials, but
 since it deals with sun's position and his shadows, I couldn't think
 of anyone better than you to help me.
 I have a little garden here at home, a walled area where I grow some
 plants in pots. I've found that, depending on the place, teher's a
 difference greater than 2.5 hours in the sunlight a plant receives,
 and that affects greatly its development.
 

RE: An opportunity

[Dave Bell]

Very interesting model, Fabio!

Please tell us more about it; I didn’t see anything related on your website.

 

Dave

  _  

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Fabio
nonvedolora
Sent: Sunday, November 24, 2013 5:08 AM
To: sundial@uni-koeln.de
Subject: Re: An opportunity

 

Hi Tony

 

it’s amazing I worked on the same matter in the last days.

 

My horometer has a different target, it is a cardboard model with the
purpose to be very cheap and for portable use. I attach a photo of the
prototype.

My model has a new approach, it has a time scale of an hour on 360° and the
longitude scale of 15° also developed on 360°. The indexes of the longitude
are on a spiral scale so it is universal. This approach is 24 time more
accurate then a scale of the whole longitude (-180° to 180°) on 360°.

The diameter is 21 cm or 8.3 in, like an A4.

 

You can see the prototype in the photo, it will be ready in the next days
and I will post photos and description on my site (www.nonvedolora.eu).

 

ciao Fabio

 

Fabio Savian
fabio.sav...@nonvedolora.it
www.nonvedolora.eu
Paderno Dugnano, Milano, Italy
45° 34' 10'' N, 9° 10' 9'' E, GMT+1 (DST +2)

 

From: Tony mailto:tonylindi...@talktalk.net  Moss 

Sent: Saturday, November 23, 2013 3:42 PM

To: sundial@uni-koeln.de 

Subject: An opportunity

 

Hi all,
 Some years ago I designed my alternative to the Pilkington 'SOL
Horometer'  (a heliochronometer alternative to the original Pilkington 
Gibbs model) but this was never finished due to an undetected software error
and other more pressing work.  Several sets of bronze castings were made and
some have been sold to intending makers of a Pilkington  Gibbs
reproduction (taken from my  drawing sets published some years ago) thereby
omitting the difficult hemispherical base of the original.  

As there seemed little prospect of disposing of my two remaining casting
sets I have recently completed their full machining and assembly ready for
any equatorial sundial in search of an ultra-robust bronze base adjustable
for latitudes from 0° to 90°.

The machined and assembled bronze base weighs 5kg (11lbs)

A low-res jpeg of the two bases now for sale, one assembled and the other
dis-assembled, is available on request to my gmail address:

  lindisun...@gmail.com .

Tony Moss
Ex Lindisfarne Sundials

  _  

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Re: 08:09:10 11/12/13

[Dave Bell]

As for y/m/d, I completely agree, but for a full sort, we should also write 
hh:mm:ss !

Dave

Sent from my iPad

On Nov 13, 2013, at 1:43 PM, Thaddeus Weakley thadweak...@yahoo.com wrote:

 I too strongly agree with Paul.  The /MM/DD format sorts numerically; 
 something that I gravitated to when a lad with database set-up and 
 administration.  
 
 This format also seems the most logical to me.  In the grand scope of things, 
 the millenium, century, year, month, day typically take precedence in that 
 order.
 
 And now that we increasingly are interacting with a global market - a 
 consistant, logical, and readily understood data format seems as important as 
 ever
 
 Thad Weakley
 American expat in Montreal, Quebec
 
 
  Sunclocks North America sunclock...@icloud.com
 wrote:
 
 =
 This has always been a pet peeve of mine!
 All of these differing date formats are confusing, as
 you can never really be sure
 which one people are using.  Here in Canada, it's
 even worse because some people put
 the month first like in the USA and others put the day
 first and yet others put the
 year first!  Nobody can be sure if something like
 10/11/12 means October 11th 2012,
 November 10th 2012 or November 12th 2010!  At
 least now that we're in 2013, some of
 that confusion is gone for the next 87 years.
 I think that the best way which everyone in the world
 understands is to start a four
 digit year: /mm/dd, and all the confusion goes away
 with the simple addition of two
 characters.  Plus the dates can be easily sorted
 numerically.  It's pretty much the
 only date format I ever use unless I spell out the
 month.
 
 Paul Ratto
 SunClocks North America
 
 
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 -- 
 
 Peter Mayer
 Discipline of Politics  International Studies (POLIS)
 School of History  Politics
 http://www.arts.adelaide.edu.au/historypolitics/
 The University of Adelaide, AUSTRALIA 5005
 Ph : +61 8 8313 5609
 Fax : +61 8 8313 3443
 e-mail: peter.ma...@adelaide.edu.au
 CRICOS Provider Number 00123M
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 email by anyone other than the intended recipient(s) is
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 are free of viruses. Virus scanning is recommended and is
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RE: Astronomy Picture of the Day

[Dave Bell]

To be honest, it's not even (all) the Republicans. 

It's a vocal and powerful minority of that party, that feel they can impose
their demands upon the rest of the nation.

Both major parties have been at fault throughout this sordid affair, due to
their inability to compromise, but currently, the main impediment is the
refusal of the Speaker (moderator) of the House of Representatives
(~Commons) to permit a vote that would break the impasse.

 

  _  


I guess the 'few petulant radicals' are what we call Republicans ?  Not many
countries have the head of government and the legislature of two opposing
parties.




-- 
--
Richard Mallett
Eaton Bray, Dunstable
South Beds. UK
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Re: sundials from orbit

[Dave Bell]

A very nice and readable dial in Ingleside Terraces neighborhood of San 
Francisco.
37.72465,-122.46875
Zoom out a little, and you’ll see the development is in one of two competing 
horse racing tracks from the 19th and early 20th centuries!

Dave

Sent from my iPad

On Oct 1, 2013, at 10:57 AM, Morgie Terwilliger tloc54...@aol.com wrote:

 I read John C's post with interest.  How many sundials can be read from 
 orbit?  (usual sources, not spy satellites)
 1) John's
 2) Jantar Mantar of Jaipur (26.924507,75.824919 on your google map)
 Any others?
 
 John Bercovitz
 
 
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Re: Tony Moss - hacked

[Dave Bell]

The real take-away lesson in that story is DON'T TRUST THE CLOUD

Sent from my iPad

On Sep 28, 2013, at 11:17 AM, rmallett postmas...@rmallett.plus.com wrote:

 On 28/09/2013 18:03, Roger Bailey wrote:
 Hi Tony,
  
 James Fallows wrote an excellent article on his experience when his wife's 
 gmail was hacked. Here is a link. 
 http://www.theatlantic.com/magazine/archive/2011/11/hacked/308673/  Even 
 with his top level connections with Google and the tech community, the 
 recovery was difficult. Google changed some of their practices due to this 
 exposure but the recovery process is still difficult.
  
 Good Luck, Roger Bailey
 
 
 Looks like the man's wife was not using an email client on her PC, but was 
 (and, for many years, had been) reading (and replying to) emails directly on 
 the Google servers, which is an obvious no-no.  Much better to use an email 
 client like Mozilla Thunderbird, and use a backup program like Mozbackup.  
 
 Of course, as the husband explains, if your ISP (and / or the provider of 
 your email account) is a multi-million customer company, then (a) the risk is 
 greater, and (b) the degree of support is less when something does go 
 wrong.
 
 If this is what it was like in 2011, you can bet that it will be worse 
 (rather than better) in 2013-14.
 
 I don't know who James Fallows is (or was) as I only read the first page 
 (which seemed to give the gist of what happened) but obviously his wife 
 enjoyed no special privileges from a largely automated system, as one would 
 expect.
 
 -- 
 --
 Richard Mallett
 Eaton Bray, Dunstable
 South Beds. UK
 ---
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RE: Tony Moss - hacked

[Dave Bell]

It's a pretty common scam. The perp gets access to someone's email address 
book, and sends out the appeal to various contacts. It doesn't seem to be ALL 
contacts, and it isn't clear how they are selected. The first such email I 
received was from a lady we met on a trip, and had exchanged maybe a dozen 
emails with, over at least five years. 

A change of password is usually all it takes to lock them back out, but 
sometimes that's complicated by the email service one uses. A good, strong 
password now, and care not to respond to spammers should prevent it.

Dave

-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Darek Oczki
Sent: Friday, September 27, 2013 7:05 AM
To: sundial@uni-koeln.de
Subject: Tony Moss - hacked

Early this morning I got a message from an individual pretending to be Tony 
Moss. He said he is in Limassol, Cyprus, and his case was stollen. Then he 
requested a loan of 850€. Perhaps others got something simillar. I hope nobody 
gave him anything.

-- 
Best regards
Darek Oczki
52N 21E
Warsaw, Poland

GNOMONIKA.pl
Sundials in Poland
http://gnomonika.pl
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Re: sunrise/set/twilight calculators ?

[Dave Bell]

how about altitude - CTIO shows as 2200 meters...

Sent from my iPad

On Sep 4, 2013, at 8:49 AM, Rob Seaman sea...@noao.edu wrote:

 And the winners are:
 
 Pyephem turns out to be layered on Elwood Downey's Xephem - can't go wrong 
 there!
 
 However, rather than the usual python package management minuet, sunwait is 
 an old-school software tool - just compile and run giving all the numbers I 
 asked for with one command:
 
 % ./sunwait -p 30.1697S 70.8065W
 Using location: 30.169700S, 70.806500W
 Date:4 Sep 2013 
 Local time: 11:31 
 Day length: 11:39 hours
 With civil twilight 12:25 hours
 With nautical twilight  13:20 hours
 With astronomical twilight  14:16 hours
 Length of twilight:  civil   0:22 hours
   nautical   0:50 hours
   astronomical   1:18 hours
 Current specified time zone: CLT (-4 from UTC) 
 Sun transits meridian 1241 CLT
Sun rises 0653 CLT, sets 1830 CLT
Civil twilight starts 0629 CLT, ends 1854 CLT
 Nautical twilight starts 0601 CLT, ends 1922 CLT
 Astronomical twilight starts 0533 CLT, ends 1949 CLT
 
 Interested in the nights not the days so will have to run it for the 
 preceding date, too.  Will add moonrise/set/phase some other time :-)
 
 Thanks!
 
 Rob
 --
 
 On Sep 4, 2013, at 6:44 AM, Richard B. Langley l...@unb.ca wrote:
 
 http://rhodesmill.org/pyephem/rise-set.html#naval-observatory-risings-and-settings
 
 
 On Sep 4, 2013, at 6:45 AM, Tony Finch d...@dotat.at wrote:
 
 http://risacher.org/sunwait/
 
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RE: Another building reflection of sun fries eggs

[Dave Bell]

Aaarrgh!  .the building's shape magnified the Sun's rays enough to .

 

Dave

  _  

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Tom Kreyche
Sent: Tuesday, September 03, 2013 3:20 PM
To: Sundial list Sundial list
Subject: Another building reflection of sun fries eggs

 

The latest architectural wonder! There was another one in Las Vegas a couple
years agoTom

 

http://worldnews.nbcnews.com/_news/2013/09/03/20307661-it-is-hotter-than-any
where-ive-ever-been-london-skyscraper-melts-cars-fries-eggs?lite

 



 

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Re: Orologi Solari n. 2

[Dave Bell]

Gian, thank you for posting the link to the new issue!

I was particularly taken by the lovely and simple polar dial/meridiana at 
Certosa di Vedana.
I believe I am going to have to build one for my home; it will be a nice piece 
for my front yard (South-facing.)

Can you or anyone else on the Sundial List recommend one of the several pieces 
of software that have been graciously made available to us, that can most 
easily create a plot of the analemma for a specific location on an equatorial 
plane?

I have been experimenting with apertures and roughly sizing the piece, and it 
works very well with a pinhole of 5 to 10 mm diameter and a centerline 
distance of ~50 cm. Adding a 2 diopter lens (i.e., 50 cm focal length) sharpens 
the solar image nicely, and still works fine at 25-30 degrees off axis, as it 
would be at the solstices. That size would allow me to plot the curve on 11x17 
paper in one piece, making for easy transfer to the equatorial surface...
Still undecided about whether I should design it for civil noon or local solar 
time. :{)

Dave Bell

N37.3 W121.97


Sent from my iPad

On Aug 19, 2013, at 6:37 AM, sun.di...@libero.it sun.di...@libero.it wrote:

 Dear friends,
 I am glad to inform you that number 2 of the Orologi Solari magazine can now 
 be downloaded from http://www.orologisolari.eu.
  
 Here is the list of the articles:
 The meridian line of Augustus by Paolo Albéri Auber
 The declining 'Doble Catenaria' sundial by Riccardo Anselmi
 Give me back the sundial by Luigi Caccia
 A sundial in the Vedana Certosa by Giuseppe De Donà
 The Latin and islamic astrolabe by Leonardo Di Emanuele
 Effect of refraction and dip of the horizon on sundials by Gianni Ferrari
 The Prof. Schilt test (1910 - 1999) by Alessandro Gunella
 Quirico Filopanti – 1812 - 1894 by Giovanni Paltrinieri
 All the articles are in Italian but a short sunnary in English is available.
 A bonus file can also be downloaded.
 Unfortunately we are experiencing some problems with the browser cache: if 
 you have any problems when displaying the site pages please reload the page 
 (F5 in Internet Explorer) in order to get the up-to-date page display.
 Greetings.
 Gian Casalegno
 
  
  
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RE: Re: Orologi Solari n. 2

[Dave Bell]

Somehow, I thought you’d suggest that! :{)

It was going to be my first thought, as well.

 

Thanks!

 

Dave

 

  _  

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of
sun.di...@libero.it
Sent: Saturday, August 24, 2013 2:32 PM
To: Sundial list Sundial list
Subject: R: Re: Orologi Solari n. 2

 

Dear Dave,

I agree with you on the fascination of this instrument that comes I guess
from its simplicity.


Regarding a software tool to draw the analemma, I cannot avoid suggesting
you my Orologi Solari program, but I am sure that several other programs can
pefectly suit your needs.

The choice between solar and civil time is always a dilemma.

I usually choose civil time, just to avoid a lot of questions about the time
difference between sundial and wristwatch time.


Greetings.

Gian

Messaggio originale
Da: db...@thebells.net
Data: 24/08/2013 22.50
A: 
Cc: Sundial list Sundial listsundial@uni-koeln.de
Ogg: Re: Orologi Solari n. 2

Gian, thank you for posting the link to the new issue!

 

I was particularly taken by the lovely and simple polar dial/meridiana at
Certosa di Vedana.

I believe I am going to have to build one for my home; it will be a nice
piece for my front yard (South-facing.)

 

Can you or anyone else on the Sundial List recommend one of the several
pieces of software that have been graciously made available to us, that can
most easily create a plot of the analemma for a specific location on an
equatorial plane?

 

I have been experimenting with apertures and roughly sizing the piece, and
it works very well with a pinhole of 5 to 10 mm diameter and a centerline
distance of ~50 cm. Adding a 2 diopter lens (i.e., 50 cm focal length)
sharpens the solar image nicely, and still works fine at 25-30 degrees off
axis, as it would be at the solstices. That size would allow me to plot the
curve on 11x17 paper in one piece, making for easy transfer to the
equatorial surface...

Still undecided about whether I should design it for civil noon or local
solar time. :{)

Dave Bell

N37.3 W121.97


Sent from my iPad


On Aug 19, 2013, at 6:37 AM, sun.di...@libero.it sun.di...@libero.it
wrote:

Dear friends,

I am glad to inform you that number 2 of the Orologi Solari magazine can now
be downloaded from http://www.orologisolari.eu.

 

Here is the list of the articles:

The meridian line of Augustus by Paolo Albéri Auber

The declining 'Doble Catenaria' sundial by Riccardo Anselmi

Give me back the sundial by Luigi Caccia

A sundial in the Vedana Certosa by Giuseppe De Donà

The Latin and islamic astrolabe by Leonardo Di Emanuele

Effect of refraction and dip of the horizon on sundials by Gianni Ferrari

The Prof. Schilt test (1910 - 1999) by Alessandro Gunella

Quirico Filopanti – 1812 - 1894 by Giovanni Paltrinieri

All the articles are in Italian but a short sunnary in English is available.

A bonus file can also be downloaded.

Unfortunately we are experiencing some problems with the browser cache: if
you have any problems when displaying the site pages please reload the page
(F5 in Internet Explorer) in order to get the up-to-date page display.

Greetings.

Gian Casalegno


 

 

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RE: Visibly Moving Gnomon Shadows

[Dave Bell]

I’m a little surprised at the hair-splitting responses regarding extreme
precision (Kevin was specifying 0.05 in/sec) and surface characteristics,
all of which are true, but missed the simple point of how large would the
dial have to be.

 

For a very rough first approximation, we know the shadow (or the apparent
Sun) moves through 360° in 86,400 seconds.

This converts to about 7 x 10^-5 radians per second, and the tangent o that
angle is the same, as far as matters.

Dividing 0.05 inch by 7 x 10^-5 gives a radius of a hair under 720 inches,
or 60 feet from the gnomon to the shadow surface.

 

Dave

(any maths errors can be attributed to responding before my second cup of
coffee!)

 

  _  

From: Kevin Nute kn...@uoregon.edu
To: sundial@uni-koeln.de; Peter Ransom pran...@btinternet.com; JOHN DAVIS
john.davi...@btopenworld.com 
Sent: Tuesday, 6 August 2013, 21:38
Subject: Visibly Moving Gnomon Shadows

 

 

The movement of the gnomon shadow at the famous Samrat Yantra equitorial
sundial in Jaipur is reputed to be clearly visible to someone standing near
the projection surface. I've read it moves as fast as 1 mm/s, though
obviously not all the time.  At a given latitude, say 40º N, can anyone
suggest a simple formula for estimating how far a projection surface would
need to be from a vertical or horizontal gnomon for the shadow to move at
1.27 mm/s (the practical lower threshold of perceptible movement) I wonder?
Or in other words, what's the smallest sundial you could build to see
real-time movement of the gnomon shadow with the naked eye?


Kevin Nute
Professor of Architecture
University of Oregon
School of Architecture and Allied Arts
Eugene, OR 97403
USA
kn...@uoregon.edu

 

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RE: Unicode characters for degrees, minutes, seconds above the decimalpoint.

[Dave Bell]

Good call, Steve!

 

With that in hand, you can easily (under Windows) enter both marks directly 
from the keyboard.

There is a means (perhaps not well known) supported by most MS and many non-MS 
programs, to enter any Unicode character.

 

Using the numeric keypad (NOT the top row of numbers above QWERY), hold down 
the Alt key while you enter the 4-digit decimal number that represents the 
Unicode character.

The Unicode digits, e.g. 00B0 for degree, are in hexadecimal so need to be 
“translated” to decimal first; for degree, that’s 0176.

So, entering Alt-0176 (you don’t type the dash) gives me °.

 

The Combining Dot Below is U-0323 and its decimal representation is 0803.

There are only a few you need to memorize or make a cheat sheet for.

I entered the notes below in Word, then pasted them here in Outlook.

Hopefully, they come through the maillist system intact!

 

Degree: ° (Alt-0176 = 00B0h)

With Comb Dot: °̣ (Alt-0176 Alt-0803 = 0323h)

 

Minute:  ‘̣ 

Second:  “̣

 

There are other useful characters, such as ± (Alt-0177), ² (Alt-0178), etc., 
but you can get them all from a Unicode table or from Windows’ Character Map.

(Start  All Programs  System Tools  Character Map)

Hovering over any character will give a pop-up hint with its Unicode 
representation.

 

Dave

 

  _  

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Steve Lelievre
Sent: Saturday, July 06, 2013 5:25 AM
To: Sundial list
Subject: Re: Unicode characters for degrees, minutes, seconds above the 
decimalpoint.

 

On 06/07/2013 8:38 AM, Barry Wainwright wrote:

It can be done, but how the characters are rendered depends very much on the 
application used to render them. 

 

Start  There are a block of unicode characters called Combining Diacritical 
Marks which are used to modify the preceding character. These characters 
include unicode character U-309A (UTF-8 E3 82 9A) which is a Combining 
Katakana-Hirangana Semi-voiced sound mark (but it looks very much like the 
degree symbol (U-00B0). When this character is 'typed' after a period, you get 
a character that is almost, but not quite, aligned:

 

This is the unicode typed in as characters: 127.゚42

 


Perhaps also consider the required symbol followed by Combining Dot Below 
U-0323  ( see http://www.fileformat.info/info/unicode/char/323/index.htm )


For example in MS Word a ring, prime and double prime, each followed by 
Combining Dot Below give

  


Steve

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RE: Unicode characters for degrees, minutes, seconds above the decimalpoint.

[Dave Bell]

“While you are looking at System Tools for the Character Map or Notepad, try 
the scientific calculator. Use the Dec and Hex buttons to toggle back and forth 
between decimal and hexadecimal numbers.”

 

Yup. Left as an exercise for the student… :{)

 

  _  

From: Roger Bailey [mailto:rtbai...@telus.net] 
Sent: Saturday, July 06, 2013 5:19 PM
To: Dave Bell; 'Sundial list'
Subject: Re: Unicode characters for degrees, minutes,seconds above the 
decimalpoint.

 

Interesting Thanks Steve and Dave. 

 

I use the Alt codes all the time for degrees, Greek and accents in Word. But my 
version of Word and my email program doesn't do the Com Dot trick. WordPad does.

 

While you are looking at System Tools for the Character Map or Notepad, try the 
scientific calculator. Use the Dec and Hex buttons to toggle back and forth 
between decimal and hexadecimal numbers.

 

Regards, Roger Bailey

 

From: Dave Bell mailto:db...@thebells.net  

Sent: Saturday, July 06, 2013 10:12 AM

To: 'Sundial list' mailto:sundial@uni-koeln.de  

Subject: RE: Unicode characters for degrees, minutes,seconds above the 
decimalpoint.

 

Good call, Steve!

 

With that in hand, you can easily (under Windows) enter both marks directly 
from the keyboard.

There is a means (perhaps not well known) supported by most MS and many non-MS 
programs, to enter any Unicode character.

 

Using the numeric keypad (NOT the top row of numbers above QWERY), hold down 
the Alt key while you enter the 4-digit decimal number that represents the 
Unicode character.

The Unicode digits, e.g. 00B0 for degree, are in hexadecimal so need to be 
“translated” to decimal first; for degree, that’s 0176.

So, entering Alt-0176 (you don’t type the dash) gives me °.

 

The Combining Dot Below is U-0323 and its decimal representation is 0803.

There are only a few you need to memorize or make a cheat sheet for.

I entered the notes below in Word, then pasted them here in Outlook.

Hopefully, they come through the maillist system intact!

 

Degree: ° (Alt-0176 = 00B0h)

With Comb Dot: °̣ (Alt-0176 Alt-0803 = 0323h)

 

Minute:  ‘̣ 

Second:  “̣

 

There are other useful characters, such as ± (Alt-0177), ² (Alt-0178), etc., 
but you can get them all from a Unicode table or from Windows’ Character Map.

(Start  All Programs  System Tools  Character Map)

Hovering over any character will give a pop-up hint with its Unicode 
representation.

 

Dave

 

  _  

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Steve Lelievre
Sent: Saturday, July 06, 2013 5:25 AM
To: Sundial list
Subject: Re: Unicode characters for degrees, minutes, seconds above the 
decimalpoint.

 

On 06/07/2013 8:38 AM, Barry Wainwright wrote:

It can be done, but how the characters are rendered depends very much on the 
application used to render them. 

 

Start  There are a block of unicode characters called Combining Diacritical 
Marks which are used to modify the preceding character. These characters 
include unicode character U-309A (UTF-8 E3 82 9A) which is a Combining 
Katakana-Hirangana Semi-voiced sound mark (but it looks very much like the 
degree symbol (U-00B0). When this character is 'typed' after a period, you get 
a character that is almost, but not quite, aligned:

 

This is the unicode typed in as characters: 127.゚42

 


Perhaps also consider the required symbol followed by Combining Dot Below 
U-0323  ( see http://www.fileformat.info/info/unicode/char/323/index.htm )


For example in MS Word a ring, prime and double prime, each followed by 
Combining Dot Below give

  


Steve

  _  

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  _  

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.3345 / Virus Database: 3204/6470 - Release Date: 07/06/13

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.3345 / Virus Database: 3204/6470 - Release Date: 07/06/13

image001.jpg---
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RE: Today's Google Banner

[Dave Bell]

Aside from its mathematical interest, the problem has long held a place in
my heart, as we have two daughters adopted from Koenigsberg (OK, it's been
Kaliningrad since the War, but still the same city.) I've walked one of the
bridges and visited Immanuel Kant's cathedral, but didn't have the time to
stroll all the paths.

 

Dave Bell

 

  _  

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Perit
Alexei Pace
Sent: Monday, April 15, 2013 2:55 AM
To: sundial
Subject: Re: Today's Google Banner

 

The Konigsberg bridges dilemma is particularly intriguing when explained to
the non-mathematicians, I suggest you have a look at this for a thorough
explanation

http://www.ugr.es/~fmartin/gi/bridges.pdf

 

Alex

On 15 April 2013 10:21, Frank King frank.k...@cl.cam.ac.uk wrote:

Has anyone else on this list enjoyed
today's Google Banner?

It includes:

   The celestial sphere

   Two Platonic solids

   The relationship...
 Vertices - Edges + Faces = 2

   [This doesn't hold in pathological
cases by the way!]

   The Seven-Bridges-of-Konigsberg
   problem

   A state diagram

   An argand diagram

   The relationship  -1 = e^(i.pi)

Frank King
Cambridge, UK

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RE: A prize for the worst 'non-dial', of the year?

[Dave Bell]

Impressive!  But it would be better with a bulls-eye level, rather than the
latitude scale...

-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Anne Lennon
Sent: Thursday, April 04, 2013 2:17 AM
To: sundial@uni-koeln.de
Subject: Re: A prize for the worst 'non-dial', of the year?

In message C8E7172706064817AEA4925FB251BF83@JohnHP8200
  John Pickard john.pick...@bigpond.com wrote:

 Hi David,
 
 No, it's certainly not the worst 'non-dial', it's actually a rather nice 
 conversation piece. And it is obviously the birthday or christmas present
to 
 buy any dial enthusiast!
 
 I have one, and I described it to the Sundial List way back in 2002.
 
 Of course, it is pretty useless in Australia, but it is fabulous at
 parties!

 **
 
 If anyone would like to see images of the watch, and the packaging
(complete 
 with instructions), contact me off-list.
 
 Cheers, John
 
 John Pickard
 john.pick...@bigpond.com
 

Dear John,

If those sundial watches by Fossil are no longer available, then
maybe this one (see attached photograph) might still be for sale.

As you said, it could make a good 'conversation piece' at parties,
although I think this version would be a bit more impressive!


I do not have details of suppliers - but a good place to start might
be Len Honey at Science Replicas, (in London).  He sells a lot of
similar sundial items, and a Google search can probably find him.

If not, then I think Tony Moss could give you his contact details.


Sincerely,

Anne Lennon (Mrs).


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RE: From the New York times

[Dave Bell]

What a lovely story!!

 

Congratulations, Sara!

 

Dave

 

  _  

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Robert
Terwilliger
Sent: Sunday, March 31, 2013 8:49 AM
To: sundial@uni-koeln.de
Subject: From the New York times

 

Sara
http://www.nytimes.com/2013/03/31/fashion/weddings/sara-schechner-kenneth-l
aunie-vows.html?emc=tnttntemail0=y  Schechner, Kenneth Launie - Vows 

 

 

Robert Terwilliger

Certified Master Clockmaker

2963 Bird Avenue

Coconut Grove FL 33133

305-447-4619

Map to my http://www.twigsdigs.com/repair/map.html  home shop

 

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RE: another free programmable CAD program in addition to DeltaCAD andFreeCAD

[Dave Bell]

(ability (action (agent we) (time now) (object LISP) use)) !

-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Simon
[illustratingshadows
Sent: Sunday, March 31, 2013 12:10 PM
To: sundial@uni-koeln.de
Subject: another free programmable CAD program in addition to DeltaCAD
andFreeCAD

In addition to DeltaCAD, I mentioned a while back that FreeCAD was free, all
inclusive, and programmable using Python. My python programs for FreeCAD
include hDial, vDial, vDec, mDial, pDial, Shepherd, winged azimuth, the
Cappucin dials, and an almanac.

http://illustratingshadows.com/stats-freeCAD.html


NanoCAD is the latest free programmable CAD system I have found. I have the
hDial, vDial, and vDec dials programmed in VBS, they also provide
declination curves. NanoCAD is also better than FreeCAD for drafting work.

http://illustratingshadows.com/stats-nanoCAD.html

Both FreeCAD and NanoCAD install as is, dont need extra addons, and work
first time, as well as being free. NanoCAD does have a registration and
license process, but that is automated, quick, and no cost.

Simon

Simon Wheaton-Smith
www.illustratingshadows.com
Phoenix, Arizona, W112.1 N33.5


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RE: Bexhil on Sea dial

[Dave Bell]

The world (now, at least) is full of worriers, Martina.
Not to mention attorneys...

I can sort of see minor issues with the old Bexhill dial you showed us,
with the raised, sharp-edged hour markers. They do look like they could
present a trip hazard, especially with young children or soused hooligans.

A completely flat, painted analemmatic dial should be considered harmless,
given a modicum of supervision by the teachers!

Dave in California, where even in the heart of liberal nanny state society,
we don't seem to be quite that worried.

-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Martina
Addiscott
Sent: Saturday, November 10, 2012 8:45 AM
To: sundial@uni-koeln.de
Subject: Re: Bexhil on Sea dial

In message 001601cdbf53$9388f6b0$ba9ae410$@com
  Jackie Jones jac...@waitrose.com wrote:

 Dear Diallists,
 
 I have been asked by a friend of mine about this dial which is at Bexhill
on
 Sea, south coast of England.It is new; made to commemorate the Queen’s
 jubilee.  But does anyone know who made it and why it is round, not oval
 which one would expect?
 
 
  

https://skydrive.live.com/redir.aspx?cid=585feaea9e333f3epage=playresid=5

85FEAEA9E333F3E!770parid=585FEAEA9E333F3E!769type=1Bsrc=PhotomailBpub=SD
 X.Photosauthkey=!AGuEO8ad_t-_aJc View album
 
 With best wishes,
 
 Jackie
 
 Jackie Jones
 
 50° 50’ 09” N.0° 07’ 40” W.
 
 www.sundialglass.wordpress.com
 
  


Dear Jackie,

Where exactly is this new 'Human Sundial' located, within Bexhill-on-Sea ?

If it is circular (not elliptical), then that layout is definitely wrong !


The only Bexhill layout that I was aware of, was the original one on the
sea-front there (which was installed on a raised area near the Pavilion on
the esplanade) - but as this caused many problems (fights, injuries, etc),
the local council had removed it because they were continually being sued.

I have 'attached' a photograph of that one designed by Modern Sunclocks,
which was accurate and automatically changed-over for British Summer Time.

However, it was simply too popular for its own good - and was taken away !


In fact, if you refer to the previous correspondence on this Mailing List,
it was the reason that East Sussex would not let me have any 'analemmatic'
sundial on our school playground - because they said it would be dangerous
for the children, (based on their experience, with that esplanade layout).

It seems that similar difficulties have happened with other layouts in any
public areas - see the website page at:  www.sunclocks.com/pics/fs-015.htm


I am sorry that I cannot help you with information on this new layout, but
maybe other members of this list might be able to provide further details.


Sincerely,

Martina Addiscott.


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RE: Sundial on Mars - Spirit

[Dave Bell]

I have a large print of this webcomic on my office wall:

http://xkcd.com/695/

Poor little guy.

 

Dave

 

  _  

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Woody
Sullivan
Sent: Saturday, August 11, 2012 12:23 AM
To: sund...@rrz.uni-koeln.de
Subject: Re: Sundial on Mars

 

Colleagues:

 

Attached is the first  image of the latest MarsDial, which
indeed is the calibration device for the main camera (Mastcam) on
Curiosity Rover, which landed safely in Gale Crater on Mars 5 days ago
(hurrah!).

The MarsDials were originally fabricated (in 1999) for the Mars
Rovers Spirit and Opportunity, which landed in 2004, and the latter of which
is STILL working over 8 years later. To date over 35,000 images have been
taken of the two MarsDials - the most photographed thing on Mars! As
mentioned below, I was intimately involved in all aspects of making these
calibration devices into working sundials - design, fabrication, operations,
etc. However, because of other commitments I chose not to be part of any
Curiosity efforts, so my report in the following paragraph is that of a
(very) interested observer.

In order to save some money, the Curiosity MarsDial is a slight
modification of one of the 6 copies that we made in 1999. A couple of
magnets were added (to try to repel dust), new plates were put on it to
change various wording such as the date and, in particular, the motto. The
motto is now To Mars to Explore rather than the previous Two Worlds One
Sun. But the biggest difference is that, as far as I know, no one is ever
going to superimpose the hour/date lines so that it can actually be used as
a sundial! And yet NASA's publicity continues to call it a sundial.But
I'm still very happy to see the first images of it (attached). A complete
battery of MarsDial images taken through many filters can be found at
http://mars.jpl.nasa.gov/msl/multimedia/raw/?s=3 .

 

Cheers,
Woody Sullivan

 



 

This is the Mars dial designed by Woody Sullivan at the University of
Washington. He gave a short update on the design at the NASS Conference in
Seattle last year.
Seehttp://www.sundials.org/attachments/article/174/2011%20NASS%20Conference%
20Seattle.pdf for a retrospective on the conference but very little on the
dial.

Yes, the sundial is based on a colour comparator and the orientation of the
dial changes when the rover moves. The hour lines lines are added by NASA
back on Earth. The original design is described on Woody's website, more
specifically in the following article. See
http://www.astro.washington.edu/users/woody/MarsDial.Plan_Rept.Jan04.pdf .

Regards, Roger Bailey

 

+++

 

Color calibration was the primary function, however these sundials - which
are also on the previous Mars rovers - were in fact designed to also be
used to show time and season. Originally they were meant to be placed on
stationary landers. Since rovers can change direction and latitude, making
permanent lines a problem, the solution was to superimpose time indicator
lines on the images digitally so the dial can be read, as in this photo
from the Spirit rover:

http://www.nasaimages.org/luna/servlet/s/fb8nc5

Here is an article (in PDF) from 2003 describing the design and operation
of the Mars sundials:


http://www.astro.washington.edu/users/woody/MarsDial.Plan_Rept.Jan04.pdf


Don Rogerson





David,

 

On

http://wtvr.com/2012/08/03/nasa-mars-rover-curiosity-will-land-early-monday/

you can read that de 'sundial' is not used to have information  to

calculate time of day, date, and seasons but as an appliance to color

balance the photgraphies Curiosity made.

 

 

Willy Leenders

Hasselt in Flanders (Belgium)

 

Visit my website about the sundials in the province of Limburg (Flanders)

with a section 'worth knowing about sundials' (mostly in Dutch):

http://www.wijzerweb.be http://www.wijzerweb.be/ 

 

+++

 

Op 10-aug-2012, om 11:03 heeft da...@davidbrownsundials.com het volgende

geschreven:

 

Dear Diallists,

I thought you might find this particularly interesting, sent to me by my

USA-based son.

 

http://mars.jpl.nasa.gov/msl/multimedia/interactives/learncuriosity/index-2.
html

then click on the arrow until you get to the description of the 'Back'

Click on the sundial (near the top/middle)

 

Also:

 

http://www.pcworld.com/article/260579/mars_rover_curiosity_a_complete_guide_
to_tagging_along_online.html

 

 

 

In particular:

https://twitter.com/marscuriosity

https://twitter.com/sarcasticrover  (unofficial I'm guessing :)

 

David Brown

Somerton, Somerset, UK

 

 

***
Prof. Woodruff T. Sullivan, III
tel  206-543-7773  fax  206-685-0403
Dept. of Astronomy  Astrobiology ProgramBox 351580
University of Washington
Seattle, WA 98195  USA

RE: Off topic but well worth sharing

[Dave Bell]

Thank, you, thank, you, thank you, Tony! What a beautiful way to start my
morning.

 

And yes, Willy, touching indeed. I dearly love Beethoven’s setting of the
Ode to Joy, and to see the response of all the onlookers, from the little
children to the old folks, singing and “conducting” along with the orchestra
was overwhelming. I still have tears in my eyes as I’m typing this…

 

“Alle Menschen werden Brüder”!!!

 

  _  

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Willy
Leenders
Sent: Friday, July 27, 2012 3:12 AM
To: Tony Moss
Cc: sundial@uni-koeln.de
Subject: Re: Off topic but well worth sharing

 

Thank you, Tony.

 

An encouraging and even touching video, in these times of European tensions.
A side note: the recording was made before the building of a Spanish bank!

 

Willy Leenders

Hasselt in Flanders (Belgium)

 

Visit my website about the sundials in the province of Limburg (Flanders)
with a section 'worth knowing about sundials' (mostly in Dutch):
http://www.wijzerweb.be

 

 

 

 





 

Op 27-jul-2012, om 09:26 heeft Tony Moss het volgende geschreven:





Hi all,
 The List has been quiet of late so I hope you won't mind me sharing
something which just 'blows me away.'

Sound on and top volume.

 http://www.youtube.com/watch_popup?v=GBaHPND2QJgfeature=youtu.be
http://www.youtube.com/watch_popup?v=GBaHPND2QJgfeature=youtu.be

Enjoy!

Tony Moss
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RE: R: Orologi Solari

[Dave Bell]

Mac, what sorts of anti-virus programs are you running on your machines?
It sounds like your systems' settings are extremely tight! 
Oh - and what browser and settings are in place?

I had no problems, but have full Admin rights, and was using Firefox, with
fairly relaxed security settings. I rely on being careful, and running
Windows Security Essentials with frequent background scans...

Dave

-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Mac Oglesby
Sent: Sunday, July 08, 2012 5:20 AM
To: sun.di...@libero.it
Cc: sundial@uni-koeln.de
Subject: Re: R: Orologi Solari


Hello Gian,

Thank you for your kind reply. I've been unable to download Orologi 
Solari onto either of my PCs, one using Windows XP, the other Windows 
7. Either the download is blocked, or the download is successful but 
immediately discarded.

However, the program is available on the NASS Repository Disc and 
I'll use that source.

My thanks to all who offered advice.

Mac Oglesby





Maybe I am not the one who should give an answer, being the author of the
program and the owner of the web site.

Anyway I can say that I have not noticed any problem recently in my web
site
nor in my program.
I usually work on two different computers that are both protected by
suitable
antivirus products.

Of course my web site could have been violated without my knowledge.
However my site gets more than thirty visits a day and this is the first
warning I get.

I had a similar problem in the past in my office computer.
The company where I work (an Italian electronics company) protects internet
connections by means of the Astaro service.
This is a very severe control.
Not only dangerous sites are blocked, also social network sites, webmail
sites
and any not well defined sites are too.

Orologi Solari is hosted on digilander.it dominium that is a freeware
hosting
site.
It happened in the past that digilander.it was included in a black list so
that I could not reach it from my office (i received warnings similar to
what
you describe).
But I had no problems when accessing the site from my personal computers
nor I
received any warnings from OS users.
I guess some site that is hosted by digilander.it was found being dangerous
and so all the digilander.it dominium was deemed to be infected by security
programs such as Astaro or Norton because of just one hosted site.

But this happened in the past, now I do not have any problems from my
office
nor from my personal home computers.

This is what I can tell you.
I hope someone else will tell us his own experience.

And I hope this will not refrain you from using Orologi Solari !

Greetings.
Gian Casalegno

Messaggio originale
Da: ogle...@sover.net
Data: 06/07/2012 11.06
A: Sundial Mailing Listsundial@uni-koeln.de
Ogg: Orologi Solari


I recently tried to download the program Orologi Solari and got the
announcement  Malicious Web Site Blocked (from Norton), which went
on to detail 7 threats to my computer.

Has this happened to others? Is the web site and/or the program safe
to download and use?

Thanks,

Mac Oglesby

---
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RE: R: Orologi Solari

[Dave Bell]

I just checked the site, (re-)downloaded the installer, and checked it for
viruses with Windows Security Essentials. All clean, and no hitches in
accessing the site or the download.

Dave

-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of David
Andersson
Sent: Saturday, July 07, 2012 10:57 AM
To: Sundial Mailing List
Subject: Re: R: Orologi Solari

In message 20713043.120731341675891462.JavaMail.defaultUser@defaultHost
  sun.di...@libero.it sun.di...@libero.it wrote:

 Maybe I am not the one who should give an answer, being the author of the 
 program and the owner of the web site.
 
 Anyway I can say that I have not noticed any problem recently in my web
site 
 nor in my program.
 I usually work on two different computers that are both protected by
suitable 
 antivirus products.
 
 Of course my web site could have been violated without my knowledge.
 However my site gets more than thirty visits a day and this is the first 
 warning I get.
 
 I had a similar problem in the past in my office computer.
 The company where I work (an Italian electronics company) protects
internet 
 connections by means of the Astaro service.
 This is a very severe control.
 Not only dangerous sites are blocked, also social network sites, webmail
sites 
 and any not well defined sites are too.
 
 Orologi Solari is hosted on digilander.it dominium that is a freeware
hosting 
 site.
 It happened in the past that digilander.it was included in a black list so

 that I could not reach it from my office (i received warnings similar to
what 
 you describe).
 But I had no problems when accessing the site from my personal computers
nor I 
 received any warnings from OS users.
 I guess some site that is hosted by digilander.it was found being
dangerous 
 and so all the digilander.it dominium was deemed to be infected by
security 
 programs such as Astaro or Norton because of just one hosted site.
 
 But this happened in the past, now I do not have any problems from my
office 
 nor from my personal home computers.
 
 This is what I can tell you.
 I hope someone else will tell us his own experience.
 
 And I hope this will not refrain you from using Orologi Solari !
 
 Greetings.
 Gian Casalegno
 
 Messaggio originale
 Da: ogle...@sover.net
 Data: 06/07/2012 11.06
 A: Sundial Mailing Listsundial@uni-koeln.de
 Ogg: Orologi Solari
 
 
 I recently tried to download the program Orologi Solari and got the 
 announcement  Malicious Web Site Blocked (from Norton), which went 
 on to detail 7 threats to my computer.
 
 Has this happened to others? Is the web site and/or the program safe 
 to download and use?
 
 Thanks,
 
 Mac Oglesby
 


Dear Gian (and Mac Oglesby),

I also had problems, trying to access the download from that website page.

Quite often, I can get browsing error messages - but in most cases this is
because the designer has not complied with the necessary 'standards', when
creating their web pages.  Unfortunately, it seems to be the reason here.


If this helps, I have attached an official W3C report - which shows that
there are 26 definite 'errors' plus 5 other 'warnings', for that web page.

In my personal experience, this mainly appears to affect any domains which
are hosted on 'free' services - normally within Europe, and/or Australia.


Just remember that not everyone will be using Microsoft Windows software
for their web-browsing, and so you would either need to test your pages on
alternative computer 'platforms' (Apple/Linux/Risc/Solaris/etc) - or to be
absolutely sure of avoiding the problems, it is much easier to just design
your web-pages to the relevant standards (which is the reason for them) !


Regards,

Dave Andersson.


-- 


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RE: a way to determine the period of insolation of a wall, using an analemmatic sundial

[Dave Bell]

Very elegant! 

It would be interesting to build a mechanical model with a moveable rule for
the wall line, for field checking.

 

Dave

 

  _  

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Willy
Leenders
Sent: Sunday, July 01, 2012 11:54 AM
To: Sundial sundiallist
Subject: a way to determine the period of insolation of a wall,using an
analemmatic sundial

 

On my website I describe the analemmatic sundial and some posibilities of
this type of sundial.

Inter alia, the Lambert Circle, and thereto is added a way to determine the
period of insolation of a wall, using an analemmatic sundial.
For these two descriptions I made a separate English translation and put
them on my website at this address:
http://www.wijzerweb.be/analemmatischengels.html
The full page about analemmatic sundials, although in Dutch, you'll find at
this address: http://www.wijzerweb.be/analemmatisch.html


Willy Leenders
Hasselt in Flanders (Belgium)

Visit my website about the sundials in the province of Limburg (Flanders)
with a section 'worth knowing about sundials' (mostly in Dutch):
http://www.wijzerweb.be








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RE: Sundial found in Jamestown excavation

[Dave Bell]

Yes, the hour lines are rather haphazardly aligned, but:

 

1)   They do seem to be (re-)drawn along the original engraving lines

2)   It appears that they correctly converge (the ones that do, anyway)
at the north edge of the string-hole, where the string actually lies, not at
the center (if that's what you meant by origin of the hole)

 

Dave

 

  _  

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Bill
Gottesman
Sent: Wednesday, June 27, 2012 4:04 PM
To: sundial@uni-koeln.de
Subject: Re: Sundial found in Jamestown excavation

 

Fred's rediscovered Serle's dialing scale plays an important role in this
video.  Fred, did the archeologists contact NASS for advice, and did the
scale come from you?  The person demonstrating the scale could have been a
bit more careful to make sure the drawn dial lines all intersected at the
origin of the string-hole, but otherwise, the scales did the trick!

-Bill

On 6/27/2012 1:07 PM, Fred Sawyer wrote:

An exciting find in the Jamestown excavation - a 17th century diptych dial.

See the article at: 

http://popular-archaeology.com/issue/june-2012/article/archaeologists-uneart
h-rare-17th-century-find-at-jamestown-excavations
http://popular-archaeology.com/issue/june-2012/article/archaeologists-unear
th-rare-17th-century-find-at-jamestown-excavationshttp:/popular-archaeology.
com/issue/june-2012/article/archaeologists-unearth-rare-17th-century-find-at
-jamestown-excavations 

Be sure to view the video that shows the actual uncovering of the dial and
the reverse engineering that determined the latitude for which it was made.
Note that the dialing scale the archeologist is using is a NASS scale I
provided to members many years ago at the first NASS conference.  (BTW if
you haven't yet sent in your registration for this year's conference in
Asheville NC, please do it soon!)  I believe the instructions he was using
came from the Compendium article by Steve Woodbury.

Fred Sawyer








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RE: The most exact sundial of the world In Samedan!

[Dave Bell]

It’s an interesting dial and looks well engineered, but there sure isn’t
much information around about it.

Appears to be an Equatorial dial with rotating outer ring to adjust for EoT
and Summer Time, but I don’t see how one *reads* it.

That tiny axial pin is useless as a gnomon except at the Equinoxes.

It seems like the inner disk also rotates and the time could be read from
the graduation on the perimeter, but lining up the three little pins’
shadows still seems impossible.

 

And perhaps the dial was inaugurated at noon on the longest day of the year,
but that photo was taken much earlier in the day!!

 

Dave

 

  _  

From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of Reinhold Kriegler
Sent: Sunday, June 24, 2012 7:40 AM
To: Sundial Mailingliste
Subject: The most exact sundial of the world  In Samedan!

 


Dear friends! Have a look to Switzerland!

Genaueste Sonnenuhr der Welt steht im Engadin 


Auf Muottas Muragl auf 2456 Meter über Meer ist am Donnerstag die genaueste
Sonnenuhr der Welt eingeweiht worden.

*
http://www.bote.ch/vermischtes/genaueste-sonnenuhr-der-welt-steht-im-engadin


Quelle: suedostschweiz.ch
*   Datum: 22.06.2012, 17:00 Uhr
*   Webcode: 39872


O I “love” the superlatives in connection with sundials!! :-)

So far this one I did not know: “The most exact sundial of the world!”

 
Best regards

Reinhold Kriegler

 

 

* ** ***  * ** ***

Reinhold R. Kriegler

Lat. 53° 6' http://www.ta-dip.de/sonnenuhren/meine-sonnenuhren.html  52,6
Nord; Long. 8° 53' 52,3 Ost; 48 m ü. N.N. 
GMT +1 (DST +2)  www.ta-dip.de

 http://www.ta-dip.de/dies-und-das/r-e-i-n-h-o-l-d.html
http://www.ta-dip.de/dies-und-das/r-e-i-n-h-o-l-d.html 
 
http://www.ta-dip.de/salon-der-astronomen/bewohner-des-salons-der-astronome
n.html
http://www.ta-dip.de/salon-der-astronomen/bewohner-des-salons-der-astronomen
.html

 

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RE: sundials and tower clocks

[Dave Bell]

You mean to say a mariner couldn't determine his heading and range from the
light by timing the sweep, compared to an atomic clock?!? Shocking. (. how
spoiled we can get with modern navigational aids!)

 

Dave

 

  _  

From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of Frank Evans
Sent: Thursday, May 17, 2012 3:37 AM
To: JOHN DAVIS; Sundial
Subject: Re: sundials and tower clocks

 

Small point, John Davis asks why Scottish lighthouse keepers used EoT values
engraved on their sundials. Lighthouse lights, like ships' lights, are lit
from sunset to sunrise. An error of even as much as five minutes would not
matter very much. 
Frank 55N 1W

On 16/05/2012 11:14, JOHN DAVIS wrote: 


Dear Frank et al,

 

Thank you for the extract from the General Order for lighthouse dials. The
thing which surprises me is that it is the EoT value engraved on the sundial
that is being taken as the correction figure, rather than one for the date
in question published in the current Nautical Almanac. Clearly, only average
accuracy could be achieved in this way.

 

Regards,

 

John

---

Dr J Davis
Flowton Dials

--- On Wed, 16/5/12, Frank Evans  mailto:frankev...@zooplankton.co.uk
frankev...@zooplankton.co.uk wrote:


From: Frank Evans  mailto:frankev...@zooplankton.co.uk
frankev...@zooplankton.co.uk
Subject: re: sundials and tower clocks
To: Sundial  mailto:sundial@uni-koeln.de sundial@uni-koeln.de
Date: Wednesday, 16 May, 2012, 11:01

Greetings, fellow dialists,
I know of two particular instances where dials were used to regulate clocks.
The first is the noon line of 1829 in the cloister of Durham Cathedral.
Obviously its only purpose was to mark the time of noon for the purpose of
correcting the Cathedral clocks. The second refers to lighthouses. In a book
entitled From Scotland's Edge by Keith Allardyce and Evelyn M. Hood the
following appears:

Since a General Order of 29 January 1852, it has been the practice to have
clocks set at local time calculated from sundial readings. The order is
precise: The Lighthouse Timepiece is to be kept right, by observing, if
possible, once a week, the indication of the Sun-dial, in the following
manner:- The Principal Keeper shall go to the dial, when the sun is shining,
and shall watch until the shadow of the style touches any hour, half hour or
other time agreed before hand with the Assistant, who shall stand on the
balcony, waiting a signal from the Principal. The Principal shall then make
the signal, on seeing which, the Assistant shall immediately set the
Timepiece to the time already agreed upon. The Principal shall then take a
note from the Table of the Equation of Time engraved on the Sun-dial, of the
number of minutes by which the clock should differ from the time given by
the dial; and shall afterwards proceed at once to the Lightroom where he
shall put the timepiece back or forward according as the Clock shall be
slower or faster than the Sun at the time.


Sundials were universal at lighthouses throughout the UK although they have
not all survived, of course.
Frank 55N 1W
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RE: Why are schools, across the world, 'banning' analemmaticsundials ?

[Dave Bell]

I had to look this one up, found what I assume is the same under Rope 
Spar sundial.
What a great idea!

I didn't have time (while at work) to figure out the details described of
how the spar is aligned to a particular angle, though. If it was level, and
true East-West aligned (and maybe that's all that was being described!) it
should be able to be calibrated for local solar time.

So a beam or rope, stretched from a building to a pole or the ground,
parallel to the Earth's axis, and an E-W line on the ground below it should
make a minimalist equatorial or polar dial, depending upon how you looked at
its derivation...

Dave

-Original Message-
Just to set the record straight, the original 
Beam  Spar dial was designed and constructed 
by Bill Maddux. He was one of my early mentors 
and later we collaborated (along with Fer de 
Vries) on several sundial articles. Bill passed 
away in 2004. In his memory, at the NASS 2007 
conference in McLean, Virginia I led a brief 
workshop where each participant assembled a small 
Beam  Spar sundial designed specifically for 
their home latitude.

Best wishes,

Mac Oglesby


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Dialing - Pyro crossover

[Dave Bell]

From a New York Times description of the fireworks displays planned for July
4, 1862:

 

A beautiful Mechanical Piece, commencing with a horizontal wheel, changing
to a vertical globe, which, by their combined motions, will represent the
annual and diurnal motions of the earth, and showing the various lines in
scarlet, green and purple fires.

 

Certainly sounds impressive!

 

Dave

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RE: Eratosthenes (Robert Kellogg)

[Dave Bell]

That’s an easy mistake, Tom!

 

Work it out this way:

If you were at the north pole, N 90° latitude, what would the Sun’s
elevation be at noon?

Or, if you were on the Equator, 0° latitude?

 

The Sun’s elevation at the Equinox is 90°-your latitude.

Since yours is *so* close to 45°, it’s almost, but not quite, the same!

 

Dave

 

  _  

From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of Tom Laidlaw
Sent: Monday, March 19, 2012 8:48 PM
To: 'Robert Kellogg'; sundial@uni-koeln.de
Subject: RE: Eratosthenes (Robert Kellogg)

 

Hello the list,

 

So them vernal/autumnal equinox is just about an hour away. I was looking at
several epemerides expedting that at solar noon tomorrow the altitude of the
sun would equal my latitude (45.6N), but it seems to be about a degree low.
What am I missing?

 

Tom Laidlaw

 

  _  

From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of Robert Kellogg
Sent: Monday, March 19, 2012 7:48 PM
To: sundial@uni-koeln.de
Subject: RE: Eratosthenes (Robert Kellogg)

---
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RE: Shadow caster

[Dave Bell]

I agree that a bright sun spot would be nice, but I don’t want to black out 
much of the window.

 

Unfortunately, over the years, the double-glazed window has grown a spotty 
diffusing layer of something (mold? dried rainwater seepage?) that makes it 
less than ideally clear.  I tried a solid, 2 inch spot of aluminum foil, and 
the shadow is barely visibly 8 feet from the glass.

I don’t think the glazing is something I can disassemble for internal cleaning…

 

I’ll print some positive and negative zone plates in different sizes this week, 
and see how they work.

 

Dave

 

  _  

From: Reinhold Kriegler [mailto:reinhold.krieg...@gmx.de] 
Sent: Sunday, March 04, 2012 11:51 AM
To: 'Dave Bell'
Subject: AW: Shadow caster

 

☺ I thought so!!!

 

Actually: Inside the house a little sunspot is much more fun than a tiny dizzy 
and diffuse shadow point…

 

Reinhold

 

* ** ***  * ** ***

Reinhold R. Kriegler

Lat. 53° 6' 52,6 Nord; Long. 8° 53' 52,3 Ost; 48 m ü. N.N.  GMT +1 (DST +2)   
www.ta-dip.de

 http://de.youtube.com/watch?v=XyCoJHwzzjUfmt=18 
http://de.youtube.com/watch?v=XyCoJHwzzjUfmt=18

 http://www.ta-dip.de/dies-und-das/r-e-i-n-h-o-l-d.html 
http://www.ta-dip.de/dies-und-das/r-e-i-n-h-o-l-d.html
 http://www.ta-dip.de/dies-und-das.html http://www.ta-dip.de/dies-und-das.html

-Ursprüngliche Nachricht-
Von: Dave Bell [mailto:db...@thebells.net] 
Gesendet: Sonntag, 4. März 2012 20:35
An: 'Reinhold Kriegler'
Betreff: RE: Shadow caster

 

Yes, I remember John’s work well, particularly for gnomon points, so the shadow 
isn’t truncated.

 

I was thinking about putting a shadow spot on one of my living room roof 
windows, particularly with the approaching Equinox.

But over an 8 to 15 foot throw, the shadow would be fairly diffuse.

 

I’m going to try printing some large (1 to 3 inch outside diameter) zone plates 
on transparency film, and see how they work…

 

  _  

From: Reinhold Kriegler [mailto:reinhold.krieg...@gmx.de] 
Sent: Sunday, March 04, 2012 10:05 AM
To: 'David Bell'; sundial@uni-koeln.de
Subject: AW: Shadow caster

 

John Carmichael has done excellent research work about this question! 

Just contact him!

 

Regards!

Reinhold Kriegler

 

* ** ***  * ** ***

 

Reinhold R. Kriegler

 

Lat. 53° 6' 52,6 Nord; Long. 8° 53' 52,3 Ost; 48 m ü. N.N.  GMT +1 (DST +2)   
www.ta-dip.de

 

http://de.youtube.com/watch?v=XyCoJHwzzjUfmt=18

 

http://www.ta-dip.de/dies-und-das/r-e-i-n-h-o-l-d.html

http://www.ta-dip.de/dies-und-das.html

 

-Ursprüngliche Nachricht-
Von: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] Im 
Auftrag von David Bell
Gesendet: Sonntag, 4. März 2012 18:50
An: sundial@uni-koeln.de
Betreff: Shadow caster

 

Several times, there have been discussions about how to improve the shadow cast 
by a point nodus. I partially recall some conclusions regarding the optimum 
diameter vs, throw length, and some thoughts about adding an annular ring to 
take advantage of diffraction. 

 

Can anyone help remind me?

Thanks!

 

Dave

 

Sent from my iPhone

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RE: Shadow caster

[Dave Bell]

That’s what I’m afraid of.

The room has three near-horizontal (2:12) roof windows, and in the high south 
wall above them, three vertical windows, from the same line.

All three horizontal windows are blotchy and hazy, but not the vertical ones. 
The outside surface was quire dirty after the winter, but a good cleaning did 
little to improve clarity; just made the blotchiness more evident.

 

Dave

 

  _  

From: Roger Bailey [mailto:rtbai...@telus.net] 
Sent: Sunday, March 04, 2012 2:59 PM
To: John Lynes; Dave Bell
Subject: Re: Shadow caster

 

It is likely worse than that, The seals often fail on double glazed windows. 
Vapour builds inside and overwhelms the desiccant in the aluminum spacer. The 
moisture tends to etch the glass. Replacement is often the only repair. Like 
most Canadians, I have been there and done that. 

 

Regards, Roger

 

 

 

From: John Lynes mailto:jly...@iee.org  

Sent: Sunday, March 04, 2012 1:21 PM

To: Dave Bell mailto:db...@thebells.net  ; sund...@rrz.uni-koeln.de 

Subject: Re: Shadow caster

 

Dave Bell -

The trouble with your double glazing is that it is no longer effectively 
sealed.  Moisture is entering from the interior of your building, and 
condensing on the inside surface of the outer face.  The remedy is to ventilate 
the gap in the double glazing to the exterior, so that the relative humidity in 
the gap is the same as the relative humidity in the outdoor air.  Block the 
passage with gauze to prevent the entry of insects or dirt.

The double glazing should then become clear.  Its thermal insulation would 
barely be affected. Worth trying?

John Lynes

 

From: Dave Bell db...@thebells.net
To: 'Reinhold Kriegler' reinhold.krieg...@gmx.de 
Cc: sundial@uni-koeln.de 
Sent: Sunday, 4 March 2012, 20:33
Subject: RE: Shadow caster

 

I agree that a bright sun spot would be nice, but I don’t want to black out 
much of the window.

 

Unfortunately, over the years, the double-glazed window has grown a spotty 
diffusing layer of something (mold? dried rainwater seepage?) that makes it 
less than ideally clear.  I tried a solid, 2 inch spot of aluminum foil, and 
the shadow is barely visibly 8 feet from the glass.

I don’t think the glazing is something I can disassemble for internal cleaning…

 

I’ll print some positive and negative zone plates in different sizes this week, 
and see how they work.

 

Dave

 

From: Reinhold Kriegler [mailto:reinhold.krieg...@gmx.de] 
Sent: Sunday, March 04, 2012 11:51 AM
To: 'Dave Bell'
Subject: AW: Shadow caster

 

☺ I thought so!!!

 

Actually: Inside the house a little sunspot is much more fun than a tiny dizzy 
and diffuse shadow point…

 

Reinhold

 

* ** ***  * ** ***

Reinhold R. Kriegler

Lat. 53° 6' 52,6 Nord; Long. 8° 53' 52,3 Ost; 48 m ü. N.N.  GMT +1 (DST +2)   
www.ta-dip.de

 http://de.youtube.com/watch?v=XyCoJHwzzjUfmt=18 
http://de.youtube.com/watch?v=XyCoJHwzzjUfmt=18

 http://www.ta-dip.de/dies-und-das/r-e-i-n-h-o-l-d.html 
http://www.ta-dip.de/dies-und-das/r-e-i-n-h-o-l-d.html
 http://www.ta-dip.de/dies-und-das.html http://www.ta-dip.de/dies-und-das.html

-Ursprüngliche Nachricht-
Von: Dave Bell [mailto:db...@thebells.net] 
Gesendet: Sonntag, 4. März 2012 20:35
An: ' Reinhold Kriegler '
Betreff: RE: Shadow caster

 

Yes, I remember John’s work well, particularly for gnomon points, so the shadow 
isn’t truncated.

 

I was thinking about putting a shadow spot on one of my living room roof 
windows, particularly with the approaching Equinox.

But over an 8 to 15 foot throw, the shadow would be fairly diffuse.

 

I’m going to try printing some large (1 to 3 inch outside diameter) zone plates 
on transparency film, and see how they work…

 

From: Reinhold Kriegler [mailto:reinhold.krieg...@gmx.de] 
Sent: Sunday, March 04, 2012 10:05 AM
To: 'David Bell'; sundial@uni-koeln.de
Subject: AW: Shadow caster

 

John Carmichael has done excellent research work about this question! 

Just contact him!

 

Regards!

Reinhold Kriegler

 

* ** ***  * ** ***

 

Reinhold R. Kriegler

 

Lat. 53° 6' 52,6 Nord; Long. 8° 53' 52,3 Ost; 48 m ü. N.N.  GMT +1 (DST +2)   
www.ta-dip.de

 

http://de.youtube.com/watch?v=XyCoJHwzzjUfmt=18

 

http://www.ta-dip.de/dies-und-das/r-e-i-n-h-o-l-d.html

http://www.ta-dip.de/dies-und-das.html

 

-Ursprüngliche Nachricht-
Von: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] Im 
Auftrag von David Bell
Gesendet: Sonntag, 4. März 2012 18:50
An: sundial@uni-koeln.de
Betreff: Shadow caster

 

Several times, there have been discussions about how to improve the shadow cast 
by a point nodus. I partially recall some conclusions regarding the optimum 
diameter vs, throw length, and some thoughts about adding an annular ring to 
take advantage of diffraction. 

 

Can anyone help remind me?

Thanks!

 

Dave

 

Sent from my iPhone

---

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RE: From Mexico with love...

[Dave Bell]

Beautiful rooms and concepts, Ruben! A wonderful teaching facility.
Your low latitude is certainly a help in fitting these dial displays to an
interior.

After viewing your pages, I once again looked at my living room with an eye
towards a noon line, as I have a roof window well situated near the South
wall, but due to its height (just over 10 feet) and my latitude (37.3°), the
resulting analemma doesn't fit the living room at all. It's too far from the
South wall in Summer, and extends well past the open floor space in Winter.

However, it did get me to thinking again, and doing some calculations.
If I designed the line for a more southern location, say 9° North, the total
length of the analemma was much shorter, and the Summer end would extend
South of the ceiling hole, quite close to my South wall.

Moving my home 28° to the South isn't very practical, but it occurred to me
that I could introduce a deviation in the incoming rays, and accomplish the
same result! I thought of a prism, but the geometry isn't very good; finding
the right prism (apex angle and refractive index) would be difficult and/or
expensive, and I would have to deal with chromatic dispersion, as well. But
a pair of mirrors, even first-surface mirrors, is much easier. If the first
mirror (to the north of center) was blacked-out, with a small, pinhole
reflective aperture, inclined vertically or slightly to the North, its
reflected beam could fall on the second, larger, flat a few inches to the
south, inclined 14° more to the north. The 14° apex angle of the pair would
introduce a 28° deviation towards the south, independent of the exact
inclination of the pair. (They would have to be accurately aligned
East-West, of course.)

Any inaccuracies in mirror angles and orientation would be hard to allow for
in  plotting the Noon analemma, but I could always fall back on the ancient
empirical method of driving a tack at 12:00 local solar time, once a week!

Something a little like the ASCII sketch below.
Assume the light enters from above and to the right...

|
|\
| \
   \
\

Dave

-Original Message-
On Behalf Of ruben nohuitol

Hi friends, please look my cosmic room, 
my page is www.ruben.mx


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RE: Proceedings for Future of UTC meeting

[Dave Bell]

Frank, you ask, Now just what was it that was going on
2011 years ago?

Isn't the correct answer,
Not a whole lot! Jesus was only 7 years old...

Rejoice in the return of the Sun!
Blessed be...

Dave

-Original Message-
From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of Frank King
Sent: Saturday, December 24, 2011 1:41 AM
To: Mac Oglesby
Cc: sund...@rrz.uni-koeln.de
Subject: Re: Proceedings for Future of UTC meeting 

Dear Mac,

You say:

 May I ask a stupid question? 

They are often the best.  Remember the recent
thread started by someone who thought it wrong
to imagine that the sun moved across the sky?

[I didn't respond to that one, but insisting
that the sun stays in the same place would
mean you couldn't say Oh, what a beautiful
sunset.  You would have to say Oh, look at
that beautiful horizon-rise instead!]

 What was wrong with AD and BC?

There are strange people who seem to suffer
an attack of the vapours when they come across
anything hinting at religion.

This pretty much rules out studying a good
many subjects.  You can't study architecture,
astronomy and certainly sundials for very
long without coming across Egyptian gods,
Greek gods, Roman gods, Christian practices,
Muslim practices and all the rest.

In the case of AD there is the additional
problem that it stands for two Latin words
and other strange people think that using
a dead language isn't user-friendly.

They won't get far studying the history of
science either!

Happily, Latin isn't quite dead.  I am one
of 40 or so people in my neck of the woods
who is actually paid to declaim Latin in
public (loudly and with enthusiasm!).

Enjoy your 2011 Christmas.

Now just what was it that was going on
2011 years ago?

Frank King
Cambridge, U.K.

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RE: Proceedings for Future of UTC meeting

[Dave Bell]

Yeah, my head hurts when I try to visualize an integer line without zero, BC
(before coffee), so I was probably off a year, anyway.

I used the 7 BC date, as that was the most recent I had heard.
That was from Brent Walters, professor of religion at San Jose State
University, but he was far from conclusive on it. He just did a fun radio
program that was basically The truth about Christmas and Hanukah!

Dave


-Original Message-
From: Frank King [mailto:frank.k...@cl.cam.ac.uk] 
Sent: Saturday, December 24, 2011 10:15 AM
To: Dave Bell
Cc: 'Frank King'; sund...@rrz.uni-koeln.de; frank.k...@cl.cam.ac.uk
Subject: Re: Proceedings for Future of UTC meeting 

Dear Dave,

Hmmm.  Hard to comment on this...

 ... Jesus was only 7 years old...

Given the absence of zero, 2011 years
ago takes us to 1BC.  There is a little
uncertainty but current best estimates
of the date of birth seem to fall in the
range 6BC to 4BC which would make the age
between 3 and 5 years.  I guess we agree
that not a whole lot was going on!

There is a well-known sundial near where
I am sitting which has an inscription that
uses A.S. instead of A.D.

Brookes and Stanier say that this stands
for  Anno Salvationis  but I feel that
Anno Salutis  is also a candidate.

Both mean  In the Year of Salvation  and
I wonder whether using A.S. might cause
less distress to those who need smelling
salts when they read A.D.?

No doubt someone can tell me how common
it is to see A.S. on sundials?

We can be fairly sure that you don't
often see B.C. on sundials, at least
not as the date of manufacture :-)

Felix Nativitas

Frank


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RE: An alternative mapping site

[Dave Bell]

Jim Tallman *did* ask, Let me know what you think and how it works for your
part of the world .

 

Dave

 

 

  _  

From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of Alexei Pace
Sent: Thursday, November 17, 2011 6:14 AM
To: Richard Mallett
Cc: Sundial Mailing List
Subject: Re: An alternative mapping site

 

I have to say this review was just a waste of bandwidth.

It was just another resource - if it does not apply to you then simply
ignore it. No need for any adjectives.

 

Alex

 

 

For my postcode LU6 2EA it only offers Bing Maps or Yahoo Maps, and the
latter is blank.,  Very poor.  No others.  Not even Google Maps, though it
offers Google Ads at the top.  Also, the Bing satellite photo is very poor
resolution.  All in all, this is absolutely dreadful.








-- 
--
Richard Mallett
Eaton Bray, Dunstable
South Beds. UK


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Slow Time

[Dave Bell]

A nice concept, considering our recent discussions on timekeeping:

 

http://www.kickstarter.com/projects/scottthrift/the-present?ref=NewsOct1311
http://www.kickstarter.com/projects/scottthrift/the-present?ref=NewsOct1311
utm_campaign=Oct13utm_medium=emailutm_source=newsletter
utm_campaign=Oct13utm_medium=emailutm_source=newsletter

 

Dave

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RE: Walking Shadow Riddle

[Dave Bell]

Interesting question!!

 

I couldn't get my head around it, either, so tried plotting it in Excel.

Grabbing a table of Solar Azimuth for Tucson on today's date, I estimated a
5 mph rate.

Since the Sun rises just barely South of East, the path starts out heading
North and mostly West.

By noon, our trekker has reached 25 miles West and 12 miles North of his
starting point.

By sunset, he has walked back East to a point 25 miles North of his start.

 

The path looks like half of an ellipse with an East-West major axis of
roughly 50 miles, and a North-South minor axis of slightly over 25 miles.

 

December 21st looks a lot different, and I'm having trouble buying it!

 

Dave

 

  _  

From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of John Carmichael
Sent: Tuesday, September 06, 2011 11:08 AM
To: 'Sundial List'
Subject: Walking Shadow Riddle

 

A Riddle:

 

I was watching a dumb movie last weekend and there was a bit of dialogue
that caught my attention.  I'm sure this relates to sundials and mapping,
but the answer eludes me.

 

One of the characters was told by the wise man to: walk towards your shadow
all day, starting at sunrise and stopping at sunset at which point the
walker would discover the location of a treasure.

 

So I asked myself, what would the path of the trek look like on a map? But I
can't figure it out.  This is as far as I get in my thinking: I started
considering an example with these conditions.- The walk begins at dawn on
the equinox, and the man is on the equator. And the walk ends at sunset.  So
we know that the walk will last twelve hours. If the average speed of a
walking man is 5 km/hr. , it is 12 hours from sunrise to sunset; then we
know that he will walk  60 km.  He'll start walking towards the west at dawn
and his path will turn towards the north in the morning as the sun heads
south.  After Solar Noon, his path will turn towards the east he'll end up
facing due east at sunset. And we know that the path will be a curve since
his shadow will always be changing direction.  But what would the curve look
like on a map?  Would it be a hyperbola? How would the curve change if he
walks on the summer solstice instead?   What if he's at the North Pole?

 

John C.

 

 

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RE: Minimum size (was Re: the nature of time, was RE: UTC Conference)

[Dave Bell]

One more example of how much one learns from this group!
I always thought that *was* a saying from the US side!

-Original Message-
From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of Tony Moss


Apologies if I seem to be 'teaching my granny to suck eggs' here (I hope 
that means something US side).

Tony Moss


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RE: Falling Tree

[Dave Bell]

Karon, even as a life-long XY, I was not offended by your humor, nor I
imagine were most of us.

 

Another maillist I have been enjoying for several years almost was closed
down two days ago, due to an argument about attachment sizes and trimming of
posts.

The list owner, self-admittedly a crotchety old man, took a parting insult
to heart when one of two problem members unsubscribed.

The owner said he was throwing in the towel, and gave us 48 hours to collect
pictures and files before closing the group.

He has since relented, saying he’ll leave the group up, but it looks like
he’ll not be participating himself for a while at least.

 

This morning, someone sent the coment below to the group; take it for what
it’s worth, but there may be a correlation here.

Heck, it’s even astro/calendro/gnomonical!!

 

Dave

 

I hope you all realize that it's a full moon and the seasons are changing.

Almost every list I'm on is having arguments of one kind or another. 

Happens every year. It is not a co-incidence.

Give it a week and everything will calm down and everybody will feel better.

And no, I don't think it's fair either, that all should be punished because
one person complained and another was rude. 

 

 

  _  

From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of karon
Sent: Friday, August 12, 2011 3:59 AM
To: 'karon'; 'Donald Christensen'
Cc: sundial@uni-koeln.de
Subject: RE: Falling Tree

 

I have been informed that my personal opinion is not welcome on this
subject.  So I will no longer be involved in what I thought was a joke in
which the entire group was participating. 

 

I apologize for having fun and playing along with you guys. it won’t happen
again.

 

Karon Adams

Accredited Jewelry Professional (GIA)

You can send a free Rosary to a soldier!

www.facebook.com/MilitaryRosary

www.YellowRibbonRosaries.com

 

From: karon [mailto:ka...@karonadams.com] 
Sent: Friday, August 12, 2011 6:39 AM
To: 'Donald Christensen'
Cc: 'Mike Shaw'; 'Archie Kregear'; 'sundial@uni-koeln.de'
Subject: RE: Falling Tree

 

It’s not a joke. Is it?G

 

Karon Adams

Accredited Jewelry Professional (GIA)

You can send a free Rosary to a soldier!

www.facebook.com/MilitaryRosary

www.YellowRibbonRosaries.com

 

From: Donald Christensen [mailto:dchristensen...@gmail.com] 
Sent: Friday, August 12, 2011 3:23 AM
To: ka...@karonadams.com
Cc: Mike Shaw; Archie Kregear; sundial@uni-koeln.de
Subject: Re: Falling Tree

 

Don't worry Karon, I enjoyed your joke. I'm also glad to see that you didn't
get upset when the joke/slam agaist women was passed that according to
women, men are always wrong

On Fri, Aug 12, 2011 at 9:43 AM, karon ka...@karonadams.com wrote:

Yes, especially if his lips are moving. The inherent wrongness is a function
of the xy chromosome not a function of whether there is a pair of XX
Chromosomes to hear the incorrect statement.

 

Karon Adams

Accredited Jewelry Professional (GIA)

You can send a free Rosary to a soldier!

www.facebook.com/MilitaryRosary

www.YellowRibbonRosaries.com

 

From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of Mike Shaw
Sent: Thursday, August 11, 2011 6:21 PM
To: Donald Christensen; Archie Kregear
Cc: sundial@uni-koeln.de
Subject: Re: Falling Tree

 

If a married man says something in the middle of a forest where nobody can
hear him – is he still wrong?

 

Mike Shaw
53º 22'N 03º02'W
www.wiz.to/sundials




-- 
Cheers
Donald
0423 102 090


This e-mail is privileged and confidential. If you are not the intended
recipient please delete the message and notify the sender. Un-authorized use
of this email is subject to penalty of law.
So there!

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RE: Falling Tree

[Dave Bell]

I’m sorry, Julie – did you say something?

 

  _  

From: Julie Gard [mailto:jet...@live.com] 
Sent: Friday, August 12, 2011 5:23 PM
To: db...@thebells.net; ka...@karonadams.com; dchristensen...@gmail.com
Cc: sundial@uni-koeln.de
Subject: RE: Falling Tree

 

I, for one, found yesterday's exchange quite amusing. Karon, you are
intelligent and articulate. Much more than I could be on the topics
discussed here.
It wasn't too long ago, someone complained about the lack of female
participation, well here you go! And she has certainly livened things up. 

As for my 2 cents, if both a man and a woman are standing in the woods and
the woman speaks, will the man hear her?

  _  

From: db...@thebells.net
To: ka...@karonadams.com; dchristensen...@gmail.com
Subject: RE: Falling Tree
Date: Fri, 12 Aug 2011 07:29:11 -0700
CC: sundial@uni-koeln.de

Karon, even as a life-long XY, I was not offended by your humor, nor I
imagine were most of us.

 

Another maillist I have been enjoying for several years almost was closed
down two days ago, due to an argument about attachment sizes and trimming of
posts.

The list owner, self-admittedly a crotchety old man, took a parting insult
to heart when one of two problem members unsubscribed.

The owner said he was throwing in the towel, and gave us 48 hours to collect
pictures and files before closing the group.

He has since relented, saying he’ll leave the group up, but it looks like
he’ll not be participating himself for a while at least.

 

This morning, someone sent the coment below to the group; take it for what
it’s worth, but there may be a correlation here.

Heck, it’s even astro/calendro/gnomonical!!

 

Dave

 

I hope you all realize that it's a full moon and the seasons are changing.

Almost every list I'm on is having arguments of one kind or another. 

Happens every year. It is not a co-incidence.

Give it a week and everything will calm down and everybody will feel better.

And no, I don't think it's fair either, that all should be punished because
one person complained and another was rude. 

 

 

  _  

From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of karon
Sent: Friday, August 12, 2011 3:59 AM
To: 'karon'; 'Donald Christensen'
Cc: sundial@uni-koeln.de
Subject: RE: Falling Tree

 

I have been informed that my personal opinion is not welcome on this
subject.  So I will no longer be involved in what I thought was a joke in
which the entire group was participating. 

 

I apologize for having fun and playing along with you guys. it won’t happen
again.

 

Karon Adams

Accredited Jewelry Professional (GIA)

You can send a free Rosary to a soldier!

www.facebook.com/MilitaryRosary

www.YellowRibbonRosaries.com

 

From: karon [mailto:ka...@karonadams.com] 
Sent: Friday, August 12, 2011 6:39 AM
To: 'Donald Christensen'
Cc: 'Mike Shaw'; 'Archie Kregear'; 'sundial@uni-koeln.de'
Subject: RE: Falling Tree

 

It’s not a joke. Is it?G

 

Karon Adams

Accredited Jewelry Professional (GIA)

You can send a free Rosary to a soldier!

www.facebook.com/MilitaryRosary

www.YellowRibbonRosaries.com

 

From: Donald Christensen [mailto:dchristensen...@gmail.com] 
Sent: Friday, August 12, 2011 3:23 AM
To: ka...@karonadams.com
Cc: Mike Shaw; Archie Kregear; sundial@uni-koeln.de
Subject: Re: Falling Tree

 

Don't worry Karon, I enjoyed your joke. I'm also glad to see that you didn't
get upset when the joke/slam agaist women was passed that according to
women, men are always wrong

On Fri, Aug 12, 2011 at 9:43 AM, karon ka...@karonadams.com wrote:

Yes, especially if his lips are moving. The inherent wrongness is a function
of the xy chromosome not a function of whether there is a pair of XX
Chromosomes to hear the incorrect statement.

 

Karon Adams

Accredited Jewelry Professional (GIA)

You can send a free Rosary to a soldier!

www.facebook.com/MilitaryRosary

www.YellowRibbonRosaries.com

 

From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of Mike Shaw
Sent: Thursday, August 11, 2011 6:21 PM
To: Donald Christensen; Archie Kregear
Cc: sundial@uni-koeln.de
Subject: Re: Falling Tree

 

If a married man says something in the middle of a forest where nobody can
hear him – is he still wrong?

 

Mike Shaw
53º 22'N 03º02'W
www.wiz.to/sundials




-- 
Cheers
Donald
0423 102 090


This e-mail is privileged and confidential. If you are not the intended
recipient please delete the message and notify the sender. Un-authorized use
of this email is subject to penalty of law.
So there!


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RE: Longitudinal shift, another way

[Dave Bell]

Simplest dial of all to understand – it’s a space-frame model of the Earth…

 

  _  

From: karon [mailto:ka...@karonadams.com] 
Sent: Wednesday, July 27, 2011 5:06 PM
To: 'David Bell'
Cc: sundial@uni-koeln.de
Subject: RE: Longitudinal shift, another way

 

DARN IT! now I have to learn how to make THOSE! I was JUST starting to
understand horizontals and declinations and suchG

 

Well, another gauntlet tossed down!

 

 

 

Karon Adams

Accredited Jewelry Professional (GIA)

You can send a free Rosary to a soldier!

www.facebook.com/MilitaryRosary

www.YellowRibbonRosaries.com

 

From: David Bell [mailto:db...@thebells.net] 
Sent: Wednesday, July 27, 2011 7:34 PM
To: ka...@karonadams.com
Cc: sundial@uni-koeln.de
Subject: Re: Longitudinal shift, another way

 

Create a uniquely crafted armillary sphere for your friend! It could pack in
a table lamp sized box for those many moves. It can be truly universal and
can be installed and adjusted for any location. 

The only tricky part would be if they were to be stationed on the southern
hemisphere. You'd need to include two hour rings...

 

Dave


Sent from my iPhone


On Jul 27, 2011, at 4:24 PM, karon ka...@karonadams.com wrote:

OK, instead of making a sundial specifically for my longitude, why not make
a regular, solar time correct sundial, with noon straight up. Instead of
using a triangle style, use a post at the height of the top of the style.
Then, if you move, so long as you are at the same latitude, the dial can be
adjusted, up to 15 degrees either direction, to accommodate for longitude if
you want.

 

If you move to a different latitude, you can also replace the pole with a
shorter or taller post.

 

I was thinking of this because of a friend of mine. She is shortly to marry
and I thought of making her a sundial. Problem is, her fiancée is in the
military. This will, of course, be requiring many, many moves on her part.
So I was trying to find a way to make a sundial she could take where ever
they were assigned and still have it accurate.

 

Karon Adams

Accredited Jewelry Professional (GIA)

You can send a free Rosary to a soldier!

www.facebook.com/MilitaryRosary

www.YellowRibbonRosaries.com

 

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RE: Longitudinal shift, another way

[Dave Bell]

Ah - of course! Mount the ring in reverse, and the numbers go the other way
'round.

 

  _  

From: Chris Lusby Taylor [mailto:clusbytay...@enterprise.net] 
Sent: Wednesday, July 27, 2011 6:10 PM
To: David Bell; ka...@karonadams.com
Cc: sundial@uni-koeln.de
Subject: Re: Longitudinal shift, another way

 

An armillary sphere can be used in either hemisphere. The only issue is that
the hour numbers, if written with their base lines along the equatorial
ring, will be upside down, but you could provide numbers facing both ways,
one set either side of the centre of the hour band. Or, you could turn the
numerals 90 degrees or even, as I did for an equatorial dial I made for
Singapore, use non-numeric pips, as on playing cards, that can be read
either way up. 

 

Chris

 

- Original Message - 

From: David Bell mailto:db...@thebells.net  

To: ka...@karonadams.com 

Cc:  mailto:sundial@uni-koeln.de%3e sundial@uni-koeln.de 

Sent: Thursday, July 28, 2011 12:33 AM

Subject: Re: Longitudinal shift, another way

 

Create a uniquely crafted armillary sphere for your friend! It could pack in
a table lamp sized box for those many moves. It can be truly universal and
can be installed and adjusted for any location. 

The only tricky part would be if they were to be stationed on the southern
hemisphere. You'd need to include two hour rings...

 

Dave

 

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RE: Most Valuable Sundial?

[Dave Bell]

Exactly. This article confuses valuable with expensive!

Make a garden non-dial of a carved solid diamond. Is it valuable? Or just
ostentatiously costly.

 

  _  

From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of Roger Bailey
Sent: Saturday, July 16, 2011 8:47 PM
To: Sundial List
Subject: Most Valuable Sundial?

 

I happened to come across this obscure link to the Guinness Book of Records
for the most valuable sundial.

 

http://community.guinnessworldrecords.com/_Most-valuable-sundial/blog/145878
5/7691.html

 

Perhaps, but define value. Is it cost? tons of bronze and gold plating, man
hour of construction? I think not. This sundial is a replica. Perhaps the
original was much more valuable, historically, culturally, scientifically. 

 

Value is not the cost to reproduce. I have designed a sundial to reproduce
at a different location the famous sundial designed by Ibn Al Shatir in
Damascus in 1371, a complex sundial, the first sundial with a polar gnomon.
Mine is a fine sundial but the original is valuable.

 

Are there other nominations for the most valuable sundial.

 

Regards, Roger Bailey

 

Life's but a Walking Shadow.  

 

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RE: How to force spreadsheet to create printable graph with samescale in X and Y?

[Dave Bell]

It's not easy, as I have also found.
Here's a hint to the procedure. The author's intent is to force a certain
aspect ratio on the chart, for the best visibility of trends. Interesting
concept, in itself...

Another suggestion farther down, below the == bar.

Dave

http://processtrends.com/pg_data_vis_bank_to_45.htm

Excel's chart object includes three areas:

Overall chart area (Title, horizontal  vertical offsets, Plot Area)
Plot area (Axes marks, labels, area inside axes)
Data rectangle (actual data area inside axes)



To control the h/w aspect ratio, we must be able to accurately specify the
width and height of the data rectangle. How can we directly control the
dimensions of the data rectangle?

Excel lets Users manually size the chart area and plot area; Excel does not
let the User directly control the data rectangle aspect ratio The chart area
includes the plot area and titles and offsets, controlling chart area
dimensions does not directly control the data rectangle dimensions. The plot
area includes the axis tick marks and labels as well as the data rectangle,
so the data rectangle  aspect ratio is affected by both the plot aspect
ratio and axis formatting. Differences in X and Y axis formatting will
affect the aspect ratio,.

The data rectangle is the actual graph area inside the axis lines. By
turning off all X and Y axis major and minor tick formatting, labels and
axis titles, we can make the the plot area and data rectangle the same. We
can then use dummy axis series to provide X and Y axis labels and text boxes
to provide axis titles.

To provide data rectangle dimensions based on target h/w aspect ratio, I
have developed a multi step procedure to control the data rectangle aspect
ratio:

Turn off X and Y axis tick marks and labels and axis titles so that the
data rectangle and plot area are equal.
Create X and Y dummy axis series
Run VBA procedure that gets user provided target data rectangle width,
Aspect Ratio and offsets, sets data rectangle dimensions,  establishes plot
area and chart area dimensions based on User input.

The VBA procedure lets me specify the data rectangle width and desired h/w
aspect ratio. The procedure then sizes the data rectangle - plot area and
chart area so that the plot area aspect ratio meet the required value.

===

You can force the plot area of a chart to be 1:1 ratio'd.
Add a dummy series to your chart and change the chart type to Pie. Clear the
formatting of the slices.
You can also force the x and y scales to be the same by adding another dummy
series that plots the Min and Max x and y data value on both the x and y
scales.


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RE: Multignomon Sundial

[Dave Bell]

Keeping the stainless steel as a requirement, you might epoxy a small,
high-tech ceramic magnet to the top of each SS pin.

Then, a magnet used as a probe could extract the pins, once you've lifted
the sculpture enough to take off the side load on the pins.

 

Dave

 

  _  

From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of Chris Lusby Taylor
Sent: Monday, June 13, 2011 2:41 AM
Subject: Re: Multignomon Sundial

 

Something I'm planning to do but haven't yet done, to secure a sculpture to
its plinth, is to drill two or more holes at different angles into both. A
deep hole in the dial, shallower in the plinth. Then, stainless steel pins
could be put in the deep holes, the sculpture/dial moved to the correct
position, the pins should drop down into the shallow holes and hold the
dial. The only way to get it off would be to turn the whole thing upside
down. To drill the holes, I'd make two jigs by clamping two pieces of
laminate and drilling right through them at skew angles. Has anyone tried
this? Glue would be simpler but too permanent for the sculpture I have in
mind. I used a similar method to hold the gnomon of the dial I showed at the
BSS Exeter conference last year.

 

Chris

51.4N, 1.3W

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RE: Multignomon Sundial

[Dave Bell]

I haven't finished my morning coffee yet, so may be missing something, but
what sort of compound angle will this jig not do?

If you need to drill a hole off normal to the surface, the jig aligns that.
Then, if the plane of the hole is also not parallel to one of the dial plate
edges, you rotate the jig on the surface, around the hole center. I *think*
any hole angle can be reduced to a combination of those two rotations...

And yes - Tony's suggestion of a mill cutter is exactly what's needed.
Out of curiosity, I've asked about it at an on-line machine shop. It looks
perfectly feasible there, but I'd like to know how much it would cost!

Another approach, similar to Frank King's of designing a mount and mass
producing them, would be to fabricate the many small gnomons as a rod with a
sharp bend near the end. Then insert the short ends into normally drilled
holes in the dial plate, and epoxy in place. A simple guide held (somehow)
at a fixed angle to one edge of the plate would suffice to align each gnomon
parallel.

Dave

-Original Message-
From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of Brent
Sent: Monday, June 13, 2011 7:34 AM
To: sundial@uni-koeln.de
Subject: Re: Multignomon Sundial

They also make these adjustable jigs for drilling angle 
holes: (it won't give you compound angles though)

http://www.grizzly.com/products/Drill-Guide/H3487



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RE: Are there any commercially-available 'Teaching Sundials', for schools ?

[Dave Bell]

And I thought we had a near monopoly on stupidity in bureaucracy and
litigation phobia in the US! Very, very sad...

Dave 

-Original Message-
From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of Martina Addiscott
Sent: Friday, April 22, 2011 4:27 PM
To: sundial@uni-koeln.de
Subject: Re: Are there any commercially-available 'Teaching Sundials',for
schools ?

In message 4bf91f91-2e43-4531-8fdb-e98e9db0f...@thebells.net
  David Bell db...@thebells.net wrote:

 The only conceivable problem that I could suggest is related to the
complaints (were they also from the UK?) of outdoor dials being an
attractive nuisance. I can see a flock of unruly kids pushing and shoving
to each have a go at the dial. Eventually someone would get hurt, and the
local Council doesn't want to be liable...
 
 Dave


Firstly, thanks to everyone who took the trouble to reply to my query.  I
do not really have the time to respond to you all, individually - but hope
that the following will explain the situation, (and the rather ridiculous
attitude adopted by Councils plus Educational Authorities, within the UK).


As at least some of you will know, schools must (under the law) conduct a
risk assessment of any new addition to the school buildings or grounds.

Just as mentioned by Dave Bell and Frank King (though they were probably
intended as 'tongue-in-cheek' comments), that is EXACTLY why we cannot get
permission for a 'dangerous' Human Sundial painted on to our playground.


Basically, the powers that be think that there will be arguments and/or
fights between the pupils who want to use it as intended - but also those
children who want to use at the same time for other things (and, yes, the
central 'scale-of-months' does indeed look a bit like a Hopscotch grid).

Not only that, but they feel that enticing (their words, not mine) kids
into the sunshine is a 'bad thing' - in case it increases their chance of
developing skin cancer in the future, and the Educational Authority does
not want to get sued for injuries or health-related compensation claims.


I do not know whether this is true or not, (perhaps someone on this List
can confirm) - but I was told that schools in Australia have BANNED the
use of analemmatic dials on playgrounds, for sunshine/skin cancer reasons.

It seems that children in Australian schools must by law wear protective
clothing (and hats) when outside in sunshine, within the school grounds.

Anything which increases 'exposure-time' to sun, is actively discouraged.


At least in the UK, there seems to be a general opinion that any 'public'
Human Sundials are a cause of trouble - and I was referred to this page
on the Modern Sunclocks website at:  www.sunclocks.com/pics/fs-015.htm


For all of those above reasons, our request has fallen upon deaf ears,
which then led to my request for details on any other 'Teaching Dials'.

Sincerely,

Martina Addiscott.

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RE: Print me a Stradivarius...

[Dave Bell]

Can one 'print' a dial, gnomon and all, for example?  Could an incompetent
like me print out a fabulously ornate gnomon which hitherto only the likes
of Tony Moss could create?

Simply put, Yes! But the Devil's in the details.
Developing the necessary definition files is still a big task, a great deal
beyond designing a dial with a simple CAD or sundial program. Making just a
gnomon this way should be well within reach, though.

At this point, you can even build your own 3D fabricator.
Another approach is to do it with a subtractive process, rather than
additive, programming a computer-controlled mill to do the work.
Probably cheaper for now.

I hadn't thought of it before, but one can import vector graphic artwork and
use it to engrave various materials, right from your PC desktop.
Check out http://www.frontpanelexpress.com/  out of Seattle and Munich, if I
recall correctly. I've had a number of equipment panels made by them, and
it's very nice finished work!

Dave

-Original Message-
From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of Peter Mayer
Sent: Thursday, February 17, 2011 3:51 PM
To: sund...@rrz.uni-koeln.de
Subject: Print me a Stradivarius...

Hi,

   The recent issue of the _Economist_ magazine has this as its title, 
and contains a significant article devoted to 3-D printing, using 
fabricators (or fabbers).  Essentially these are forms of ink jet 
printers which create 3-D objects in plastic or metal.
   Shapeways (http://www.shapeways.com) is a commercial firm which will 
'print' out objects, things in stainless steel, alumide, glass, nylon, 
polycarbonate, acrylic.  The maximum size for stainless steel (also 
available in 'bronze diffused' matt) is 100cm(W)x45(D)x25(H) @ upwards 
of $10 per cubic cm.
 Can one 'print' a dial, gnomon and all, for example?  Could an 
incompetent like me print out a fabulously ornate gnomon which hitherto 
only the likes of Tony Moss could create?
   As Agatha Christie's detective, Hercule Poroit was wont to say, it 
makes one 'furiously to think'.

best wishes,

Peter
--
Peter Mayer
Politics Department
The University of Adelaide, AUSTRALIA 5005
Ph : +61 8 8303 5606
Fax : +61 8 8303 3443
e-mail: peter.ma...@adelaide.edu.au
CRICOS Provider Number 00123M
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Dial photo I ran across

[Dave Bell]

On the f295 Forum for pinhole photography, a couple of pics of the dial 
in Peckham Rye Park, London:

_http://www.f295.org/Pinholeforum/forum/Blah.pl?m-1222461148/s-0/#num6_

I vaguely recall reading about this dial on this list at one time.
Anyone have more information about it?

Dave


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Re: FW: Computer Aided Dialling: progeCAD Smart - a LISP h-dial for anyone who cares

[Dave Bell]

Simon [illustratingshadows wrote:
 I am completely disinterested in LISP. But this is a
 working skeleton for anyone who is so interested.

 It has one bug which I document, and needs an
 enhancement, which I also comment on. And it is not
 going to be me who does any more work on it. LISP is
 not my kind of language.

 Humph!

 Simon
Heh...  It's been way too many years since I've done any Lisp.
I congratulate you on giving it a try; it's not usually the sort of 
thing to pick up in a day!

Dave
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Re: Skylight Dial

[Dave Bell]

Carl  Barbara Sabanski wrote:
 I have attached a photo of the sundial with the hour lines extended.  They
 appear to join at an origin located at the top edge of the banner making
 this top edge the style.  Looking closely at the vertical corner where the
 yellow and blue walls join it can be seen that the glass roof actually
 slopes down slightly. 

It also looks to me as if the banner is not quite parallel to the
mullion, but slopes a little more steeply.
Hard to tell for sure, but I'm looking at the blue-sky gap...

  This would make the top edge of the banner, the
 style, slope down slightly.  This slight slope would indicate that the
 building is probably located at lower latitude making the gnomon's height of
 a vertical sundial approach the vertical. 

One of Trenwyth's facilities is in Phoenix, AZ, so fairly far South.

  This in turn would make the hour
 line angles almost equiangular or close enough to make them appear to be in
 such a photo.  Also noon does not appear to be directly below the origin
 indicating that the hour lines have been corrected for longitude.

   

 


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Re: Skylight Dial

[Dave Bell]

Carl  Barbara Sabanski wrote:
  Looking closely at the vertical corner where the
 yellow and blue walls join it can be seen that the glass roof actually
 slopes down slightly.

I was taking a closer look at this, before I closed the image viewer.
Looking at the blue tiled wall, it's clear that the slope is actually
fairly significant.

The angle of the photo makes it hard to be certain, as it distorts the
tiles, but I would estimate the tiles to be pretty close to a 3:1 aspect
ration (say 2x6 inches, etc.)
Given that, and judging the nearly straight section where the roof
intersects the wall, I count a rise of 5 1/2 tiles over a run of 3 tiles.

5.5 / (3*3) gives the tangent of 31.4 degrees, so puts the roof and
style at 58.6 degrees from perpendicular to the dial face.
Now, 31.4 *is* a couple of degrees south of Phoenix, into Sonora, MX,
but if the banner slopes 2 degrees below the roof, it would be very hard
to see in the photo.
And the angle derived from the tile dimensions could hardly be called exact!

(Hmm, what would be the effect of including the grout spacing?)
OK, Excel to the rescue:
Estimating tiles at 2x6, I threw in 1/4 grout line, and stuffed the
formulas into Excel.

The intention was to use Goal Seek to adjust the assumed grout thickness
to get 33.4 degrees, and see if that was anything liek reasonable.
With no tweaking, the 1/4 spacing yielded 33.24 degrees, just a couple
miles south of central Phoenix!

Dave



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Re: Azimuth of Sunrise - Sunset

[Dave Bell]

Robert Terwilliger wrote:
 How about a single (composite) photo of the sun rising AND setting on 
 the Winter Solstice?
  
 http://apod.nasa.gov/apod/ap071222.html
  
 Bob
Beautiful!! Be sure to click through to the photographer's pages.

Some great astronomical and travel photos.
The pages of crepuscular landscapes has some really striking work, including 
this APOD and what appear to be some extra sunset series from the same site.
 
Dave
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Urgent call:

[Dave Bell]

Could Giovanni Bellina and/or Franco Martinelli please contact me off 
list as soon as possible?
This is regarding a magazine that would like to publish one of 
Giovanni's photos from the 1999 partial solar eclipse.
I have them on display (with permission) on my eclipse page from our 
trip to Romania, and they are hoping for a permission to use one, and a 
higher-resolution image.

Thanks!

Dave Bell

[EMAIL PROTECTED]
http://www.nauticoartiglio.lu.it/almanacco/Aa_ecli_13.htm
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Re: Mystery object

[Dave Bell]

Frederick Jaggi wrote:
 Hi Everyone:

 Here's a mystery object from the current Skinner auction. Could it be  
 sundial related?
 http://www.skinnerinc.com/asp/fullCatalogue.asp?salelot=2383++93 
 +refno=++691521saletype=
 Fred Jaggi
 ---
   
Or, even a sundial itself!
First, a short link, that won't get trashed by email programs:
http://tinyurl.com/3yqcjk

It's a crystal globe that acts as a lens to focus a sun spot onto the 
curved brass curved.
The plate is engraved for hour lines and declination curves...

Dave
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Re: Equation of Time

[Dave Bell]

Roger Sinnott wrote:
 Mac and others,

 Here is a first attempt, using Google Sketchup.

  -- Roger

 
   
 Nice!! So, you have two matching inclined surfaces, one on the pedestle, and 
 one on the carrier.
   
If you were doing this for a telescope, I guess you'd put two Teflon 
pads on the carrier's surface.
For this application, more friction is actually beneficial, so that's 
not necessary.

I've seen Poncet mounts that use a ball/socket for the pivot point. How 
are you suggesting the pivot be made?
Maybe a rounded pin into a conical hole in a hardwood block? And it 
looks like the pin would lie in an equatorial plane, parallel to the 
polar end plane...

Is there a height alignment requirement for the pivot point, relative to 
the inclined plane?
Horizontally, it should be centered, but I have a feeling it needs to be 
placed at the right height on the meridian end, as well.

Great sketch - I have to get around to learning Sketchup!

Dave
   

 

 

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Re: Painted Wall Sundials Webpage

[Dave Bell]

Subject: New Webpage of Painted Wall Sundials at 
http://www.advanceassociates.com/WallDial/PWS_Images.html



The page is now up to 161 painted dials!

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Re: Are there any Complex number formulas used in sundial calculations?

[Dave Bell]

Chris Lusby Taylor wrote:


When tabulated trig functions became available, and since calculators became
affordable, trigonometric equations involving only real (not complex)
scalars (i.e. numbers, not vectors) became the favoured form. Tony Belk
recently published a series of articles in the BSS Bulletin on vector
methods, which seem to solve certain problems very well. Others, myself
included, like the elegance of matrices. But neither vectors (which are
one-dimensional matrices) nor two-dimensional matrices are well supported by
the commonest computer languages (who, I wonder, has an APL interpreter?),
so we stick to what we know and can persuade a computer to calculate, which
is scalars.

Well put, Chris... I imagine plane trigonometric functions (and, by 
extension, spherical) can be expressed in complex form, but it's not 
necessary or particularly a better way of doing things. As for vector 
and matrix math(s), I agree not many have access to APL, and few can 
justify Matlab for home use, but take a look at Euler some time. 
Completely free, long history, (since 1988.), supported under Windows, 
Linux, and even an old OS/2 version. Far smaller than Matlab, too - 
around 67 MB.


http://mathsrv.ku-eichstaett.de/MGF/homes/grothmann/euler/

Dave

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Re: Heliochronometer card dials?

[Dave Bell]

On Tue, 17 Oct 2006, Fred Sawyer wrote:

 The Icarus dial by Carlo Heller is a universal ring dial with adjusments for 
 longitude, dst, and equation of time.

I'm not familiar with that design, and couldn't (quickly) find a reference
to it, but what about something like this, cut from heavy cardstock?

http://www.aboutstonehenge.info/index.php?pg=sundial-pocket
http://www.online-relics.com/acatalog/Ringdials2.html

Or is it yet another L.A.T. dial?

Dave
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Re: A very cool clock--Can you figure it out?

[Dave Bell]

On Fri, 29 Sep 2006 [EMAIL PROTECTED] wrote:

 Sundial Listers:

 I met a media student named Josh Anderson at Teacher's College in New York,
 who had developed a fascinating graphic clock for his computer screen.  I 
 asked
 him to make it available on the web.

 Here is the link.

 http://www.fetmar.org/bookClock/

 See if you can figure out how it to read it--it's pretty clever.

 -Bill G.


Very pretty!

Well, aside from reading the text clock in the lower-right corner: :{)

The number of rows of bocks/cells represents the hour.
The lighted columns increment (right-to-left) every minute, but there only
appear to be about half as many as there should be. This is at 11:57 my
local time. Let's see what happens in a couple of minutes!

Interesting! At 12:00, the entire field of blocks went dark, not lighting
the botom row, as I expected.

Ah-hah! Minutes fill left-to-right in the first 30, then right-to-left.
And all 12 rows are lighted. The glitch is that at 12:00 and presumably at
24:00, the wall goes dark. Not really a glitch, just a special case...

Dave
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Sundial? Another interesting art project

[Dave Bell]

Well, it does sort of indicate solar time.

http://www.wonderblimp.com/sundial/

Dave

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Re: Sundial Website Ideas

[Dave Bell]

John Carmichael wrote:

Here is a wish list for 2 educational sundial websites that do not 
exist but should:
 
1. _www. paintedwallsundials.com_
 
2. www.interestinggnomons.com http://www.interestinggnomons.com
 
I don't have time to put these websites together and Dave Bell would 
strangle me if I asked him to do any more webmastering, but I have 
some good photos, as I'm sure many of you guys do, that I could 
contribute.



No, no thoughts of strangulation here, John!

We already have a basic layout plan than is reasonable to manage.
Change some colors, new header graphics, probably reduced text areas, 
and you're there.


Another domain name thought would be to create a general Sundials site, 
below which all these sub-domains included.


Dave


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