Ken,
Your original mail has the sentence:
*
It seems to me (Ken) that it should be possible to build such a dial, since the
EOT is a function of date, and date lines can be read from many sundials. In
principle, I can just re-label the date lines with corresponding EOT values and
Len,
Some more about this sundial is to read at
http://www.dse.nl/~zonnewijzer/sunpointer.htm
Bestwished, Fer.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
- Original
Donald,
As already comfirmed by others, your thoughts about the (elliptical)
analemmatic sundial will work.
If the slope isn't to high a human still may act as the shadowcaster, otherwise
a vertical rod is needed.
But there is a second solution.
Calculate the equivalent horizontal place for
Dear All,
This is a high claim for the accuracy of reading a sundial.
I want to add my thoughts about the effect of the EoT to the reading.
Near the dial is a table with the daily correction for longitude and EoT.
Now the values are given for 2011 and 2012.
It looks that every two years this
'
analemmaticsundials ?
Hi Dave,
Bill Maddux's article is in Compendium vol 9 no 1, March, 2002, pp. 16-23.
Here's a screen shot of one of his constructions, from that article:
http://dl.dropbox.com/u/3688834/Maddux%20cord%20and%20spar%20dial.png
You can see a model by Fer de Vries at:
http
Muhammad,
At the link
http://www.de-zonnewijzerkring.nl/eng/index-vlakke-zonw.htm
you may find a complete method to calculate all kind of lines on flat sundials,
including antique hourlines.
Best wishes, Fer.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
Hi Woody,
Great to see the new day starting at Seattle.
It still was dark and now the street lights are off.
The sundial is good to see now.
I am waiting for the sun but the forcast wasn't sunny.
At my home the sun has set now and the street lights are switched on.
Have a nice day and I look
Donald,
I can't open your file because I have an older Excel program.
But I think to have the solution what you want to do.
You set your watch to local suntime.
With that time you are in the field with a sundial.
Seen the pictures that is an analemmatic sundial, corrected for longitude.
The
wishes, Fer.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
- Original Message -
From: Donald Christensen
To: fer de vries
Cc: sundial
Sent: Friday, October 14
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
- Original Message -
From: Donald Christensen
To: fer de vries
Cc: sundial
Sent: Friday, October 14, 2011 12:55 PM
Subject: Re: solar time
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
- Original Message -
From: fer de vries
To: Donald Christensen
Cc: sundial
Sent: Friday, October 14, 2011 4:20 PM
Spencer,
Is it possible to show us picture(s)?
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
- Original Message -
From: Spencer Duane
To: sundial@uni-koeln.de
Frank,
I don't know a name for the longest day but it is not in september.
It is around Christmas.
Then a day is about 24 hours and 30 seconds.
Look in a table for the EoT to the difference from day to day.
Your value for mid-September is correct.
Best wishes, Fer
Fer J. de Vries
De
Donald.
Many ways to solve your problem and I add mine as I use in my program ZW2000 to
calculate flat sundials .
The procedures are published on the website of De Zonnewijzerkring.
Address below.
Look for:
- Calculate and construct.
- Flat sundials, extensive version.
Read the preface and
Karon,
The declination of the sun, north or south to the equator, always is in the
range -23.44 to 23.44 degrees.
So make a series of lines on your dial of constant declination, e.g. in steps
of 2 or 5 degrees within that range.
This will last for ever.
Or make a zodiac calendar on your dial
Donald,
For a while I have some placed in a .zip file for download at:
http://www.de-zonnewijzerkring.nl/downloads/analem-dials.zip
Fer.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N
Mike,
Your question:
*
If you are going to allow your shadow to pass through two panes of glass, will
refraction start to become important?
*
John Carmicael answered:
*
It's insignificant.
*
My answer is:
It is significant.
Your statement is: shadow to pass through two
assumption. You taught me not to assume anything!
I have a question though-
Does the refraction error increase if the distance between the two glass
panes increases?
From: fer de vries [mailto:ferdevr...@onsneteindhoven.nl]
Sent: Thursday, August 04, 2011 1:29 AM
To: Mike
Karon,
Your question:
Where, within a time zone in the US, is the Solar time correct
To me solartime is Local Solartime and that is independant from the time zones.
It is always correct.
And Willy Leenders loves it.
It is the natural time with noon always at 12.
(Have in mind that 1 hour
Donald,
Your statemant the Abrams Sun Compass is an analemmatic sundial wasn't
incorrect.
The compass is a number of patterns of analemmatic sundials in one
instrument.
By that it can be used fore a series of latitudes.
Best wishes, Fer.
Fer J. de Vries
De Zonnewijzerkring
Brent,
A date line can be:
hyperbola
parabola
ellipse
circle or
straight line.
There are a lot of (gratis) computerprograms to calculate sundial patterns.
My program e.g. is ZW2000.
Best wioshers, Fer.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
here:
http://www.sundialsatlas.eu/atlas.php?PHPSESSID=8e74105bf2da4262cba08780f5d6a131
left to right reads:
80-90-100-10-20
Can you explain why?
thanks;
brent
fer de vries wrote:
Frank,
For another French Revolution sundial look at the website of De
Zonnewijzerkring.
Address below.
Look
Frank,
For another French Revolution sundial look at the website of De
Zonnewijzerkring.
Address below.
Look for:
article of the month
archives 2005
month 05-04, (April)
You see at noon it is 5 decimal time.
Around the dial is a double scale for azimuth in 400 degrees with 0 and 100
at
Another addition:
- UV radiation.
It helps to read how dangerous the sun somtImes is for our skin.
Fer.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
- Original
Phil,
On this address
http://www.dse.nl/~zonnewijzer/hemisph.htm
you find a pocedure I once wrote to construct a hemisherium.
Best wishes, Fer.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N
Frank,
At our website
http://www.de-zonnewijzerkring.nl
you may read the procedure I use in my program ZW2000 to calculate sundials.
Follow:
calculate and construct
flat sundials - extensive version
main procedure
I start with the sun's position relative to the equatorial plane, given by
decl
Reinhold,
Thanks for your (and Joseph Pastor's) note about these remarkable instruments.
Read more at:
http://www.opizzo.de/fr/uniques/bisingen/bisingen.htm
http://www.opizzo.de/fr/uniques/brittheim/brittheim.htm
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
Friends,
Because of problems with the program ZW2000 in 64 bit computers the program is
updated to version 2.0.
Now the program runs in both 32 and 64 bit computers.
The updated version is for download at:
http://www.de-zonnewijzerkring.nl/downloads/zw2000version2.zip
The program ZW2000
Hi Mac,
Try:
Options
Options
Screensize
You get screen `Set Actual Sreen Size`
Note values as backup.
Try several new values to correct the screen.
Best wishes, Fer
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven,
Tom
On the website of De Zonnewijzerkring you may find a description of a
procedure to calculate all kind of lines, inclusive date lines.
Have a look if this is what you look for.
Follow the links:
Calculate and construct
Extensive version
And then the procedures preface and so on.
Best
Friends,
In the mean time a number of messages are on the English and Italian
mailinglist about this Human dial.
The enthousiasme for this type is great and that souns good.
However, the type isn't new form the 2000's.
It is some 25 year ago I quess that I once saw a horizontal example in
John,
Here some more links about the dial in Melbourne.
Still not details of the scale with markers.
The last link gives a page with nearly down an oveview.
Click for larege photo.
Best wishes, Fer.
http://www.infolink.com.au/n/Melbourne-s-newest-piazza-wins-an-MBA-award-n763733
Robert,
Jan Kragten lived in the same street as I and we did a lot in dialing
together.
Pity he past away in 2001.
I only have a paper copy of his English manuscript about the Ship of Venice
but I read that
Jürgen Hoefeld should have an electronic version.
I tried to find it at Jürgens website
Friends,
In this mail is mentioned:
Dr. Catherine Eagleton cites Ingrid J. Kragten ... .
This sound as Jan Kragten is female.
It is true, his manuscript is signed Ing. J. Kragten.
Ing. is a tiltle and means ingenieur. (engineer).
Best wishes, Fer.
Fer J. de Vries
De Zonnewijzerkring
Hi John,
It is about 3:30 pm on the dial.
It is a point dial.
On one of the photos you see a schadow of a sun with a hole to produce a spot
of light.
The hours to use the dial are limited.
Best wishes, Fer.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
Edley,
In our coutry there are a number of armilleries with a buit in correction
for the EoT.
You may see one at our website
Work of members
Archives 2004
Month 01-04
The dial is rotated around the polestyel by turning a scale of dates.
Best wishes, Fer.
Fer J. de Vries
De Zonnewijzerkring
Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
- Original Message -
From: Robert Terwilliger
To: 'fer de vries' ; 'sundial'
Sent: Wednesday, September 30, 2009 5:46 PM
Subject: RE
Best wishes, Fer.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
- Original Message -
From: Bill Gottesman billgottes...@comcast.net
To: fer de vries ferdevr
Patrick,
The sunpointer is 10 years old now. Inaugurated in 1999.
Design: Jan Bey, Jurgen Konings.
Built: Bruns BV, Westerhoven.
See www.bruns.nl
English version is under construction at the moment I looked, but try the Dutch
version.
Link
Producten / Technische modellen
Zonnewijzer
Friends,
Attached is a picture of another mechanical sundial and it is an antique one.
I hope the small picture will pass.
If you like a some better picture send me an e-mail.
The (one) hand of a clock runs like the shadow of a south dial from VI to VI
over a sundial pattern in the corect
Frank,
Declination lines normaly used on a dial are correct but you have to see
them as lines for constant declination.
In a day the declination changes so the lines aren't correct as lines for
the date.
Also the average declination changes in a period of 4 years.
So in fact datelines never
Dear friends,
A few months ago John Carmichael warned me that my program ZW2000 didn't work
on his new 64 bit computer with Vista64.
In the mean time I succeeded to make changes in the program and John reported
to me that it works on his new computer.
So now there is a vesion that works with 32
Sasch,
On inernet I foud for the Marean-Kielhorn Director an US patent, number 2440827.
The patent is dated May 4, 1948 but filed Aug 20, 1945.
Sepatate I send it to you.
Is this the instrument you have?
If so I would be pleased to receive the instructions if you could make an
electronic copy
Frank,
I agree with you that astrologers need to know sunrise or sunset.
Not only for the houses as you say but also for the planetary hours, no
matter
what system of houses or planetary hours is used.
But about the counting of the houses I do not agree with you.
Fom sunrise to sunset the
Friends,
The basics for the dam-dial is a shadow tangent to an hour line.
More about these basics may be read in:
Compendium, Nass, vol. 12, nr. 4, December 2005,
Alessandro Gunella, Italy, A sphere as a gnomon..
Compendium, Nass, vol. 13, nr. 1, March 2006, letters.,
Note by Rolf
Dear Friends,
On the occasion of our number 100 bulletin, may 2009, this bulletin is for
download available at:
http://www.de-zonnewijzerkring.nl/downloads/zwk-bul-100-mei-2009.zip
However, some wrote the bulletin couldn't be downloaded.
If so try:
Angelo,
I had a look to the clock on a computer with Windows XP.
I used it with latitude 52, longitude 0 and timezone 0.
The hora local and UT should be equal but from time to time there is a
difference of one second.
See attached example.
Within this one second the clock gives the same time as
Fred,
As long as we have no other program to keep Dialist Companion running on a 64
bit computer DosBox still is very useful for many calculations.
Only the time in Dialst Companion and the sytem clock are out of phase but for
many calculations the program still is very useful.
Best, Fer.
Fred, John,
I noticed this before, but no, we don´t loose Dialist Companinon.
Only the time isn´t in phase with the systemclock but many options of DC still
can be used.
An important thing is to calculate the exact position of the sun if you want to
find out the north south ditrection or the
Roderick,
The sun doesn't give its real postion on the map but only the azimuth of the
sun relative to the pointer of your place.
Fer.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N long.
Friends,
Another example is seen at our website .
Follow links:
work of members
archives 2008
month 08-07 (July)
Best wishes,
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
Willy,
Have a look at our website for:
- article of the month
- archives 2005 (year)
- month 05-08 (august)
It is about a conversion graph for suntime, Bab , It. and antique hours.
Some down you see some formulas:
in which
ZT = suntime
HD = half day length.
Bab = ZT - (12 - HD)
It = ZT +
Friends,
On my computer still is this picture of the Balwin Solar Chart.
On the web I couldn´t find it back.
Best wishes, Fer.
I hope the 32kB picture wil pass.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
Conxita Bou,
My congratulations to the people who made the trip to the pole and to anyone of
the team that was involved.
Best wishes, Fer.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N
Bill,
Thanks for pointing to your video's.
Interesting to see them
Best wishes, Fer.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
- Original Message -
From: Bill
Brent,
Now I have seen your photo's and I understand your dial.
It is a polar plane with a vertical gnomon on it.
You use this only for noon and you added a scale for the dates.
That will work well.
In fact it is a meridian line.
Many are made on horizontal or vertical planes but they can be
Dear Dialing Friends,
Nicola Severino, Italy, just updated his interesting website and you may
find some new items.
The first item is an Italian article by Nicola about a manuscript from
George Hartmann (1489 - 1564).
The article has 32 pages with a number of interesting images.
The second item
David,
It depends on the value of the longitude. France is rather wide.
If e.g. the longitude is east and smaller then 7.5 degrees E you are right.
If the longitude is larger then 7.5 degrees E then you are wrong.
At 15 degrees E the hourline for 12 is in winter in top.
See the attached
John,
I know that ZW2000 runs with Windows Vista 32 bit system but I have no
experiences with a 64-bit system.
I also have no idea in what way we could get it running on a 64 bit system.
I hope with you that someone can help us.
Beste wishes, Fer.
Fer J. de Vries
De Zonnewijzerkring
is to find on the internet.
Best wishes, Fer de Vries, Netherlands.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
- Original Message -
From: Fred Sawyer
Hi Willy,
Not only sundials should be allowed in someones garden, also works of art,
ornaments,
sculptures.. It is just silly to forbid this.
Arguments like ours for sundials are due for all kind of valuable objects.
Best wishes, Fer.
Fer J. de Vries
De Zonnewijzerkring
Willy,
In the past local suntime was used for civil time.
A sundial was the leading instrument.
When a clock was placed on the church the clock was regulated by the parish
clerk to local suntime with the help of a sundial.
This is why we often see a clock and a sundial on one building.
As
Dear Friends,
A second example of a Homogeneous Analemmatic Sundial by Hendrik Hollander, The
Netherlands, is now published on the website of De Zonnewijzerkring. This
example has a polestyle as shadowcaster.
Read more at the address:
http://www.de-zonnewijzerkring.nl/eng/index.htm (in
Alison,
Well, you got a number of answers that it won't work, but
Forget the analemmatic sundial and look for a shadowplane or hourplane
sundial.
Several of the wanted demands can be realized.
It is an interactive dial, it has the hourpoints at the south side and the
hourpoints can be in a
Dear Friends,
Homogeneous Analemmatic Sundial; that is the name of a new innovative sundial
by Hendrik Hollander, The Netherlands.
About this interactive sundial you may read at the addres:
http://www.de-zonnewijzerkring.nl/eng/index.htm (in English)
and follow the link Sundial of the month
MessageHans,
Not the story of a sun eclipse but of the moon eclipse of August 1617 is showed
on a beautiful sundial in Rufach, Alsace, France.
At that time and place the redish moon appeared above the surrounding mountains
and people paniced what had happened with the moon.
It was René Rohr
Despina, Peter,
The clustering of analemmatic dials as Peter writes, is a good example for a
horizontal sundial for a series of latitudes.
More about it is in Compendium vol.10 nr. 3 sept. 2003.
It needs a vertical gnomon, movable on a datescale.
But also a pole style may be used.
See e.g:
Linda Read,
I would be pleased to receive the photo of the Australian analemmatic dial.
As you suggested I attach a photo of this young man, but at least 12 years
younger the now.
Best wishes, Fer.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
Jan,
What an amazing page about the mean time analemmatic dial of Yvon Massé you
have made.
I am very glad you made it and that you placed your note to it in this
mailing list.
In 1998 I wrote an article (in Dutch) about this sundial in the bulletin of
De Zonnewijzerkring.
(Bul. 98.2 page
Francois,
On our website, Links/Societies you find a link to the Japanese Sundial Society.
Have fun reading it.
Fer.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
-
Roger, Wee-meng,
I think the timesystem in the Bible are antique hours, 12 hours from sunrise to
sunset.
With the latest Dutch translation of the Bible a few years ago it was discussed
to use our timesystem but I am glad they didn't. The antique hours are still
in use.
Many times is said that
Hi John,
If the time zone is UT + 5 hours 30 minutes the standard meridian indeed is
-5.5 * 15 = -82.5 degrees.
Succes with the sundial and please let us know how this project is going.
Best wishes, Fer.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
Hello Joël,
Great sundial is found in France.
Another example is in The Haque, Netherlands.
Have a look at our website, links:
- sundial of the month
- archives 2007
- month 07-08
But the maker obviously made a mistake.
Best wishes, Fer.
Fer J. de Vries
De Zonnewijzerkring
And on the site of De Zonnewijzerkring, Netherlands, you may find e real
example of a dodecahedron
with sundials.
http://www.de-zonnewijzerkring.nl
Look for Work of Members.
Fer.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Art,
No doubt there are more sundials made as a precision instrument.
Roger Baily already pointed to some.
A not so well known example is a latitude independent sundial, developed by
Hans de Rijk, The Netherlands.
The first latitude independent sundial was developed by Freeman around 1978.
A
.
Best wishes, Fer.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
- Original Message -
From: Fred Sawyer
To: fer de vries ; Art Krenzel ; sundial
Sent: Tuesday
Jim and others,
I know about a sundial on board of a passengers ship.
I posses a photo-copy of small booklet about the dial and its use.
The ship is the MS Oranje, built in 1938/39.
About the ship and her history have a look at:
www.ssmaritime.com/oranje.htm
The ship ended her life in 1979 as
Mac,
The link to our site doesn't work. The address in your mail is double and
should be:
http://www.de-zonnewijzerkring.nl
Thanks for your other notes.
Best wishes, Fer.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven,
Hi John,
Indeed, this is a simplification of the formula for a sundial.
In stead of phi I prefer another letter for the style height but that's just a
choice. I use v.
Phi then still is the latitude.
It also is my practice to start with the calculation of the styleheight for any
planar
Mario,
This is just the feeling I had, now already 15 years ago, based on the note
by Drecker.
At that time I wrote some thoughts about this in the bulletin of De
Zonnewijzerkring. (January 1992).
With this thread on the Sundiallist we have some other historical sources
that such a timesytem
Mario,
Thanks about your note about the panetary hours.
Togeher with the message by Roger Baily about an English translation of
Sacrobosco's text we have more sources that say that at least there is a
timesystem in history based on the rise of 15 degrees of the elcliptic, no
matter what name is
Nicola,
In this discussion you write:
The Planetary hours are equal to the seasonal hours ..
In most of the literature this is true but according to Joseph Drecker
(1925) the planetary hours are different from seasonal hours.
Drecker defines the planetary hours in his book as the rise of
Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
- Original Message -
From: Sara Schechner [EMAIL PROTECTED]
To: fer de vries [EMAIL PROTECTED]; Severino, Nicola
[EMAIL PROTECTED
-- Initial Header ---
From : fer de vries [EMAIL PROTECTED]
To : Severino, Nicola [EMAIL PROTECTED],noamk1
[EMAIL PROTECTED]
Cc : sundial [EMAIL PROTECTED]
Date : Wed, 16 May 2007 10:03:41 +0200
Subject : Re: Re:Greek and Roman sundials
Nicola
Tony,
About a decade ago I met in Eindhoven a Mr. Ferguson and he showed me three
sundials made by his father earlier 1900's.
So Chris Lusby is right saying twentieth century.
I have photogaphs of these three dials and I will send them to anyone who
ask by e-mail.
One example is a steady one
Hi Frank,
At the start of this thread you wrote:
**
Reference the sundial on the Old Grammar School, Hawkshead, Cumbria,
England. The school is a museum, famous as the place of William
Wordsworth's education. Over the door is a fine dial dated 1845 with
stated co-ordinates, latitude 54
Frank,
I looked with Google for the words Old Grammar School Hawkshead Cumbria and
I got a picture of the dial as attached.
I hope it will pass to the sundial list also.
It is an east declining sundial for local suntime and I think the value is
the declination of the dial.
Drawing such a dial
.
Prinsenpark should be Prinsenhof.
Fer J. de Vries
De Zonnewijzerkring
mailto:[EMAIL PROTECTED]
http://www.de-zonnewijzerkring.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
- Original Message -
From: John Carmichael
To: 'fer de vries'
Sent: Sunday, April 08, 2007 4:48
Hi Chris,
Indeed, Javier Moreno Bores developed this conic dial with Babylonian and
Italian hourlines for the contest for 12 sundilas in the sundialpark at Gent,
Belgium.
It is Fabio Savian who constructed more dials with a cone or a section of a
cone.
E.g see at
Ronit Maoz,
Strange to see the words going from right to left but I manage.
Is this the mosaic you are looking for?
I searched on the web for Anaximander sundial.
I hope it will pass the sundial list.
Apart from this mail I send you a some larger colored picture.
Best Wishes, Fer.
Fer J.
PROTECTED]
http://www.de-zonnewijzerkring.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
- Original Message -
From: fer de vries
To: ? ; sundial@uni-koeln.de ; [EMAIL PROTECTED]
Sent: Tuesday, March 27, 2007 8:24 PM
Subject: Re: mosaic of wise men under
Friends,
A new English summary of the bulletin of De Zonnewijzerkring has been written.
Now you may read English summaries of all the bulletins from 1998 to and with
2006.
Best wishes, Fer.
http://www.de-zonnewijzerkring.nl
Link: English summaries.
Fer J. de Vries
De Zonnewijzerkring
What about the Mont St. Michel in France.
It only works near equinoxes but it is a sundial.
And it is a dial on the earth, not the earth itself.
Fer.
Fer J. de Vries
De Zonnewijzerkring
mailto:[EMAIL PROTECTED]
http://www.de-zonnewijzerkring.nl
Eindhoven, Netherlands
lat. 51:30 N long.
Josef Pastor,
The dimensions of about 11 meter diameter isn't the largest one. There are may
more larger.
I only mention one in our country, in Amersfoort, of nearly 15 meters diameter
and it is certainly not the largest one.
Best wishes, Fer.
Fer J. de Vries
De Zonnewijzerkring
Mac,
At the website of De Zonnewijzerkring is a a beautiful example of a
porcelain sundial with French Revolution hours.
http://www.de-zonnewijzerkring.nl
Follow links:
Article of the month
Archives 2005
Month 05-04
Fer.
Fer J. de Vries
De Zonnewijzerkring
mailto:[EMAIL PROTECTED]
,
helpful suggestions, and who proofread the text. Special thanks go to Riccardo
Anselmi (Italy), Mario Arnaldi (Italy), Roger Bailey (Canada), Fer de Vries
(Holland), Alain Ferreira (France), Antonio Giorgi (Italy), Claude Hinsinger
(France), Reinhold Kriegler (Germany), Lucio Maria Mora
Carl and Mac,
That's a great job you have done.
Thanks for this.
Fer.
Fer J. de Vries
De Zonnewijzerkring
mailto:[EMAIL PROTECTED]
http://www.de-zonnewijzerkring.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
- Original Message -
From: Mac Oglesby [EMAIL PROTECTED]
To:
Hello Tracy,
For an usual analemmatic dialan analemma
around the central scale of date is not suitable for correcting the time with
the value for equation of time if it isn't noon.
For other times the analemma is just a table to
read the value of the EoT.
For such a reason you may drawthe
Dear friends,
On our website you may read theEnglish
summary oftheMay 2006 bulletin of De
Zonnewijzerkring.
And of course the other summaries since
2000.
These summaries are all written by the editor Ruud
Hooienga.
Best wishes, Fer.
Fer J. de Vries
De Zonnewijzerkringmailto:[EMAIL
Gerard,
You could make a sheperd's dial. These are location
specific.
Attached is a picture of the scale for such a dial
with correction for longitude and equation of time.
It would be better if you make two, one for the
morning hours and one for the afternoon hours.
Red cq blue lines in
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