. Fred Sawyer, Brian Albinson and
Helmut Sonderegger are the experts here. The math is interesting. Brian has
designed several split analemma dials in the Vancouver BC area including one at
Simon Fraser University, designed by Brian and Len Berggren.
Regards,
Roger Bailey
From: Tom Laidlaw
in Tonnerre is an original. I have seen the analemma but
don't have a picture or a good date reference. The green Michelin Guide for
Burgundy Jura says Note the gnomon (sundial) on the paving, designed in the
18C by a Benedictine monk and the astronomer LaLande (1732-1807).
Regards,
Roger Bailey
. Perhaps the full
HORIZON system available by telnet does but I have not tested the advanced
version.
Celebrate the return of the sun.
Regards,
Roger Bailey
--
From: Roger W. Sinnott rsinn...@post.harvard.edu
Sent: Tuesday, December 22, 2009 3:00 PM
at the NASS Conference in Chicago. The conversion of the
presentation to an article fro the compendium is stalled at 80% complete.
This follows the classic 80 20 rule defining work progress.
Regards,
Roger Bailey
Walking Shadow Designs
--
From: Frank Evans
My responses are interspersed below.
--
From: Frank King frank.k...@cl.cam.ac.uk
Sent: Friday, April 02, 2010 10:18 AM
To: Roger Bailey rtbai...@telus.net
Cc: Gianni Ferrari gfme...@gmail.com; Frank King
frank.k...@cl.cam.ac.uk; LISTA INGLESE sund
Thanks Mac,
These days we are overwhelmed by inputs, drinking from the fire hose of
information. Sometimes we need to step back, take a vacation, or whatever it
takes to see ourselves in the world. Your card dial did this. Our discussion
on Italian hours and Arabic numbers did this. It is
last much better.
Regards,
Roger Bailey
Walking Shadow Designs
From: Miguel A. Garcia
Sent: Wednesday, April 14, 2010 8:51 AM
To: sundial@uni-koeln.de
Subject: Restoration dilema
Dear friends
We just started a restoration program of the local sundials were we face the
following dilemma
://www.waymarking.com/waymarks/WM837M_Roman_Sundial_Ephesus_Turkey and view
the pictures in the gallery.
Also note that the hours are marked: first hour, second hour etc, not the hour
lines.
Regards, Roger Bailey
From: Dariusz Oczki
Sent: Friday, April 16, 2010 5:18 AM
To: sundial@uni-koeln.de
. The armillary sphere is
on the Portuguese flag, behind the crest.
Regards,
Roger Bailey
Walking Shadow Designs
--
From: Thomas Steiner finbref.2...@gmail.com
Sent: Friday, June 04, 2010 4:05 AM
To: sundial@uni-koeln.de
Subject: portugal
hi
I'll
intensity. At higher altitudes the UV intensity is even
greater. Skiing bikini babes, beware of the double altitude effect, among
other obvious hazards.
Regards,
Roger Bailey
--
From: J Malecki jgmale...@yahoo.com
Sent: Sunday, June 13, 2010 7:22 PM
harm's reach. This client is a
lawyer.
Most of those who answered your note would be happy to provide design
information and not request a liability waiver or statements from the
police. If you have the land owners approval for the installation, go right
ahead.
Roger Bailey
Walking Shadow Designs
to fix the
dial and put it back in service but he has retired and the new director has
other priorities. I do not know the current status of this sundial. There is a
photo of the damaged sundial on my personal website
http://www3.telus.net/public/rtbailey/images/RAO-Equ.jpg.
Regards,
Roger
on the sundial atlas or elsewhere, consider first is the dial
worth noting and second, what are the risks of showing its precise location.
Regards,
Roger Bailey
From North America where we have very few heritage sundials at risk .
--
From: Fabio fabio.sav
some are very close to the earth, others quite different, like Pluto at
17°. The eccentricity of elliptical orbits is another detail that make
things interesting.
There is a lot that we and ancient astronomers have learned from the shadow
of a stick in the ground.
Regards,
Roger Bailey
Walking
found and some are bigger. This takes
nothing away from the history of Percival Lowell, an rich astronomy
dilettante and Clyde Tombaugh, a simple farm boy who discovered astronomy,
telescopes and the PLANET PLUTO.
Regards,
Roger Bailey
--
From: J
?
Regards,
Roger Bailey
From: R Wall
Sent: Monday, September 27, 2010 6:27 PM
To: John Carmichael ; 'Sundial Mailing List'
Subject: Re: New Porcelain Wall Sundial Installed
Hi John,
A lovely looking sundial. Looks as if the house was made to fit the sundial.
During summer time, does the shadow
to the point
of insanity. Dava Sobel's book Longitude is a great read.
Roger Bailey
--
From: Brent bren...@verizon.net
Sent: Tuesday, October 12, 2010 2:59 PM
To: Roger W. Sinnott rsinn...@post.harvard.edu; Sundial List
sund...@rrz.uni-koeln.de
Subject: Re
Thanks for the note. Here is a link to the ATEN website with some pictures
of his sundial.
http://atensundials.com/homepage.html Clip and paste the url text into your
browser.
Regards, Roger Bailey
--
From: Bill Gottesman billgottes
widely held beliefs.
Regards Roger Bailey
From: Richard Mallett
Sent: Thursday, October 14, 2010 12:42 PM
To: John Carmichael
Cc: 'Sundial Mailing List'
Subject: Re: Is This True?
On 14/10/2010 17:17, John Carmichael wrote:
Yesterday, I received an email from a fellow dialist containing
rejected as an
over interpretation.
My opinions have not changed.
Regards,
Roger Bailey
From: Roger Bailey
Sent: Thursday, October 14, 2010 9:04 PM
To: Richard Mallett ; John Carmichael
Cc: 'Sundial Mailing List'
Subject: Re: Is This True?
No, It is not true. This is old news. I engaged
Of course it is considered bad form but good on you!
Roger Bailey
From: Astrovisuals
Sent: Monday, October 25, 2010 7:12 PM
To: sundial@uni-koeln.de
Subject: Sundisc Sundial
I have been making Sundials for 30 years now, mainly equatorial ones made out
of wood.
It has always been my dream
Wow, what a great exhibition and story. As a Canadian, I appreciated the
reference to Farley Mowat and wolves.
Regards,
Roger Bailey
Walking Shadow Designs
--
From: ? sundi...@mail.ru
Sent: Wednesday, November 24, 2010 7:55 AM
That is how I saw it. Thanks Darek
Roger Bailey
--
From: Darek Oczki dhar...@o2.pl
Sent: Wednesday, December 01, 2010 4:55 PM
To: sundial@uni-koeln.de
Subject: Re: New Sundial Browser
Its gnomon doesn't even cast a straight-edge
shadow
will be anything
close to a GDS that analyses up to 12 satellites of precisely known
location. But the principle is much the same.
Regards,
Roger Bailey
--
From: Brent bren...@verizon.net
Sent: Thursday, December 09, 2010 4:51 PM
To: Sundial List sund
Yes, I am on the dark side, not a HP-65 HP 67 kind of guy. TI vs HP, PC vs
Mac. The nerd wars continue. I enjoyed your comment as it brought back all
the discussions at that time. I could smile and enjoy sharing the memory
with you. Or I could react and defend my position on the SML Neither
and the setting
of the sun.
Regards, Roger Bailey
From: Bill Gottesman
Sent: Monday, December 20, 2010 8:38 AM
To: Sundial Mailing List
Subject: Wonderful NREL Sun Position Calculator, in time for Solstice fun
Hello Sundial-listers,
I used to rely on Luke Coletti's Great Circle website's
the url into your browser to see this fine
sundial.
Regards, Roger Bailey
--
From: Brent bren...@verizon.net
Sent: Tuesday, January 18, 2011 1:19 PM
To: Sundial List sund...@rrz.uni-koeln.de
Subject: Re: 360 degree
I guess if I am going to get
sundial was right next door.
See:
http://www.waymarking.com/waymarks/WM7EV1_Corner_Sundials_on_Church_Tower_Les_Vigneaux_Vallouise_Hautes_Alpes_France
Regards,
Roger Bailey
--
From: Roger Bailey rtbai...@telus.net
Sent: Tuesday, January 18, 2011 8
system at first had no time unit, and later
versions of the metric system used the second, equal to 1/86400 day, as the
metric time unit.
Roger
--
From: Roger Bailey rtbai...@telus.net
Sent: Thursday, January 20, 2011 10:14 AM
To: Roger Bailey
, Roger Bailey
--
From: Frank King frank.k...@cl.cam.ac.uk
Sent: Sunday, January 23, 2011 11:30 PM
To: Richard Mallett 100114@compuserve.com
Cc: Sundial Mailing List sundial@uni-koeln.de
Subject: Re: Fwd: [Flags] (pt) Canedo Commune (Ribeira de Pena
, the multiple star closest to earth, 4.37
light years away.
Look up! The stars are real with individual characteristics, histories and
personalities. See http://en.wikipedia.org/wiki/Alpha_Centauri, The sun is not
the centre of the universe.
Regards, Roger Bailey
frank.k...@cl.cam.ac.uk
Sent: Wednesday, January 26, 2011 2:21 AM
To: Roger Bailey rtbai...@telus.net
Cc: Sundial Mailing List sundial@uni-koeln.de; Frank King
frank.k...@cl.cam.ac.uk
Subject: Re: Fwd: [Flags] (pt) Canedo Commune (Ribeira de Pena Municipality,
Portugal)
Dear Roger
but are easier
to type in and use. I also have Google Earth kmz files for all these sundials.
The placemark appearance and 3D maps are better. Perhaps I will post a few here
as the kmz files are quite small.
I would appreciate feedback to confirm the problem and solution.
Regards,
Roger Bailey
Walking
was quicker than explaining the
logic. But you only learn by doing it yourself.
Regards,
Roger Bailey
Walking Shadow Designs
www.walkingshadow.info
From: Donald Christensen
Sent: Wednesday, February 09, 2011 2:52 PM
To: sundial@uni-koeln.de
Subject: part 2 of longitude correction
I'm laying
but not applicable here.
Regards, Roger
From: Roger Bailey
Sent: Wednesday, February 09, 2011 5:59 PM
To: Donald Christensen ; sundial@uni-koeln.de
Subject: Re: part 2 of longitude correction
Hello Donald,
Three degrees of longitude is 12 minutes of time, 4 minutes per degree, 60
minutes (1 hour) per
12:37 PM
To: 'Richard Mallett' ; 'Roger Bailey'
Cc: 'Sundial List'
Subject: RE: Sundials on Google Maps
But there's no pictures! Am I doing something wrong?
Tom Laidlaw
From: sundial-boun...@uni-koeln.de
parts of the world. It fails for you John as you are almost 6° west of
the 105° meridian. It works for me at 123.4° west of about 15 Oct and 25 Nov.
Test your location. I am sure there are exceptions to these general statements.
Regards,
Roger Bailey
Walking Shadow Designs
From: John Carmichael
Thanks Frank, it is great to be taught by the best. This is the strength of
the SML, it connects those asking questions, eager to learn, with the best
teachers. Often the roles reverse. We all benefit.
Regards Roger
--
From: Frank King
NASS is pleased to have had a minor influence on this decision. See the
newspaper article at
http://www.yourwestvalley.com/suncity/article_cc00c75c-40ec-11e0-83af-001cc4c002e0.html
Regards,
Roger Bailey
NASS Secretary
From: Simon [illustratingshadows
Sent: Saturday, February 26, 2011 2
your sign dude? I don't know. I refuse to know nonsense.
Regard, Roger Bailey
From: Willy Leenders
Sent: Saturday, February 26, 2011 12:28 PM
To: Sundial sundiallist
Subject: A blunder on the astronomical clock in Prague
There is an interesting difference in the construction of a sundial
by these discussions. We are no longer
frustrated by the adult response Just because, that is the way it is.
Cogito ergo sum has no other qualifiers.
Regards,
Roger Bailey
From: Marcelo
Sent: Thursday, March 10, 2011 3:12 PM
To: Sundial List
Subject: Where are the women?
I've just noticed that, as long as I
and semi-diameter. At theoretical
sunrise or set, you can just place one full sun diameter between the sun and
the horizon.
Regards, Roger Bailey
--
From: Brent bren...@verizon.net
Sent: Sunday, March 13, 2011 8:46 AM
To: sundial@uni-koeln.de
Subject
--
From: Brent bren...@verizon.net
Sent: Sunday, March 13, 2011 3:17 PM
To: Roger Bailey rtbai...@telus.net
Cc: sundial@uni-koeln.de
Subject: Re: Spiral cut earth
Hi Roger;
well I did that experiment.
I'm not sure I did it right or understood what you are trying
Did you see the perigee equinox full moon rise this evening? We walked down to
the nearby east facing shore to see it rise. The horizon was remarkably clear
and the rising moon was beautiful over the water, a large burnished golden orb
rising just after 8 pm. At the lunar perigee the moon is
the top 4000 ft rather than 400, sitting like a
distant icy haystack on the uncluttered sea horizon.
Regards, Roger
48 39.449 N, 123 24.050 W
From: Phil Walker
Sent: Sunday, March 20, 2011 4:08 AM
To: Roger Bailey
Subject: Re: Perigee Equinox Moonrise
I'm curious, Roger. Where did you view
on the
solstices. Declination lines are standard features on sundials, easily
calculated point by point with geometry and trigonometry.
Regards, Roger Bailey
--
From: Brent bren...@verizon.net
Sent: Wednesday, March 30, 2011 8:03 AM
To: R Wall
the 5 MB
presentation.
Regards, Roger Bailey
Walking Shadow Designs
-
From: Brent bren...@verizon.net
Sent: Wednesday, March 30, 2011 9:45 AM
To: Roger Bailey rtbai...@telus.net
Cc: Sundial List sund...@rrz.uni-koeln.de
Subject: Re: Sundial house
Thanks Richard, your link seems to provide most of the answer for the question.
Roger Bailey
N 48.6, W 123.4
Not extreme but fairly far south and west for Canada
From: Richard Mallett
Sent: Wednesday, May 11, 2011 4:10 PM
To: Fabio Savian
Cc: sundial@uni-koeln.de
Subject: Re: coordinates
.
Regards,
Roger Bailey
Walking Shadow Designs
From: John Carmichael
Sent: Monday, May 30, 2011 7:55 AM
To: 'Sundial List'
Cc: i...@mediadesign.me
Subject: FW: sundial /Jacopo de'Benci
Hi Jan- I'm forwarding your letter and my comments to the Sundial List.
Perhaps the sundial experts
with the sound on.
Enjoy, Roger Bailey
--
From: Brent bren...@verizon.net
Sent: Sunday, July 03, 2011 5:55 PM
To: Sundial List sund...@rrz.uni-koeln.de
Subject: off topic questions
Hello again;
I ask because there are a lot of very smart people
, 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.
---
https://lists.uni
From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of Roger Bailey
Sent: Saturday, July 16, 2011 11:47 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
people rule, technology
serves.
Regards,
Roger Bailey
Walking Shadow Designs
Life's but a Walking Shadow...
--
From: Rob Seaman sea...@noao.edu
Sent: Sunday, July 24, 2011 6:26 PM
To: sundial@uni-koeln.de
Subject: Re: Future of UTC / leap
surrounding delicate fossils.
Roger Bailey
Walking Shadow Designs
--
From: Ricardo Cernic rncer...@uol.com.br
Sent: Thursday, July 28, 2011 11:11 AM
To: ka...@karonadams.com
Cc: sundial@uni-koeln.de
Subject: Re: STONE!!
Karon,
Once I used diluted
dropped a
couple of the morning prayers that the monks used. This is covered in the
presentations as they have sundial content, not twitter.
Regards,
Roger Bailey
Walking Shadow Designs
--
From: Александр Болдырев sundi...@mail.ru
Sent: Sunday, August
://www3.telus.net/public/rtbailey/SML/TimeBW.PDF
Regards,
Roger Bailey
Walking Shadow Designs
N 48.6 W 123.4
Life's but a Walking Shadow...
*Daylight sayings time was introduced as a wartime expedient like income
tax. Neither were cancelled as a peace dividend
personal copies for educational
purposes.
Regards, Roger Bailey
--
From: Rob Seaman sea...@noao.edu
Sent: Monday, August 15, 2011 7:11 AM
To: sundial@uni-koeln.de
Subject: Re: Time's Arrow
The official author's copy of our preprint is available from
Hello Donald,
Many of us share your interest in developing the logic to suit our specific
purposes. Many of us have been there and done that. I even have the Sunset tee
shirt that I displayed at a NASS conference way back when.
The starting point is the spherical triangle for your position.
file.
Regards,
Roger Bailey
Walking Shadow Designs
www.walkingshadow.info
--
From: Dariusz Oczki dhar...@o2.pl
Sent: Friday, August 19, 2011 3:01 AM
To: sundial@uni-koeln.de
Subject: Sundials of French Alps
Dear Diallists
Last days of July I have
information?
I am continuing to search for sundials on interesting islands. So many
islands, so many sundials, so little time.
Sundials show slow time. There are no seconds or minutes, just the
inevitable progress of time. Life's but a Walking Shadow.
Regards,
Roger Bailey
Walking Shadow Designs
, There is no place
like home, go south to discovery the treasure. John, I guess you can say Been
there, done that.
Regards,
Roger Bailey
Walking Shadow Designs
Life's but a Walking Shadow
Been there, done that.
From: Dave Bell
Sent: Tuesday, September 06, 2011 6:42 PM
To: 'John Carmichael
increase Carbon Dioxide emissions to compensate?
Absolutely not!
Regards, Roger Bailey
Walking Shadow Designs
From: Spencer Duane
Sent: Saturday, September 17, 2011 9:49 AM
To: sundial@uni-koeln.de
Subject: The Sun's Azimuth
Has anyone noticed any differences in the sun's azimuth lately? I have
in
Virginia in 2007. This presentation is on my website
www.walkingshadow.info #7 on the list of publications.
The fall equinox this year is 23 Sept at 09:04 UTC. That is just 4 minutes
local time into 23 Sept where I live.
Regards,
Roger Bailey
N 48.6, W 123.4
on the sundial atlas, listing IT000484 at
http://www.sundialatlas.eu/ Thanks Fabio for providing this resource and
registering this sundial.
Yes there are hundreds of sundials that I should add to the atlas.
Regards, Roger Bailey
Walking Shadow Designs
Life's but a Walking Shadow
From
, Roger Bailey
Solomon Grundy,
Born on a Monday,
Christened on Tuesday,
Married on Wednesday,
Took ill on Thursday,
Grew worse on Friday,
Died on Saturday,
Buried on Sunday.
This is the end
Of Solomon Grundy.
From: John Carmichael
Sent: Wednesday, September 28, 2011 5:49
is very
important as the world changes.
Regards, Roger Bailey
--
From: Dariusz Oczki dhar...@o2.pl
Sent: Wednesday, September 28, 2011 4:30 AM
To: sundial@uni-koeln.de
Subject: Re: sundials of the Wilanów Palace (Warsaw - Poland)
Hello Willy
I don't
Hi John,
Perhaps this is an artistic Photoshop image. Check the link to Paul Grand's
redbubble original image and this other on with a pelican. He says the image is
a French Bridge in Corbiers France
http://www.redbubble.com/people/paulgrand/art/2328077-take-to-thyself-a-wise-mind
These days,
and helps explain why married men live longer. Their excesses are
moderated. Or perhaps to them it just seems longer.
Regards, Roger
--
From: Frank King frank.k...@cl.cam.ac.uk
Sent: Saturday, October 01, 2011 10:33 AM
To: Roger Bailey rtbai
is a stepping stone as in
Stones in the River, an excellent cautionary tale by Ursula Hegi. Time,
immigration and birth rates are changing our societies. Speak up or adapt.
Don't excuse or ignore.
Regard, Roger Bailey
I regret that this inappropriate commercial endorsement for Walking Shadow
measure of our time.
Be aware of the tyranny of the acceptation of incremental but fundamental
change. Sometime in the future, noon will be midnight.
Regards, Roger Bailey
Walking Shadow Designs
Life's but a Walking Shadow..
...
It is a tale told by an idiot,
Full of sound and fury
highest mountains. The
show starts and ends with pictures of the Madeira Glory.
https://picasaweb.google.com/rtbailey101/MadeiraGlory?authuser=0authkey=Gv1sRgCNio7PjTktOGSgfeat=directlink
Enjoy
Roger Bailey
Walking Shadow Designs
---
https
is to trust Google Earth. Pictures don't lie.
Believe that and you will believe anything!
Regards,
Roger Bailey
Walking Shadow Sundials
PS. Wearing another hat, I have used Google Earth images to estimate Iran's
progress towards nuclear bomb capability, specifically the route involving the
production
that demonstrate the Al Shatir Damascus sundial shows
all five Moslem prayer times. This is just my minor insight based on
communications with Gianni. I have a passing interest in Islamic sundials and
cannot read Italian but I look forward to receiving my copy in the new year.
Regards, Roger Bailey
that the earth moved. It just defied our human experience.
My challenge to this list remains. What evidence can be determined from a
sundial that the earth rotates?
Regards, Roger Bailey
From: Simon [illustratingshadows
Sent: Tuesday, December 13, 2011 5:23 PM
To: Jan Bielawski ; Bill O'Neill
Cc
for this gift for the members of the
sundial list.
Regards, Roger Bailey
From: Fabio nonvedolora
Sent: Thursday, December 15, 2011 3:09 AM
To: sundial@uni-koeln.de
Subject: paper sundial
Hi all, news from the clouds.
I’ve a toy for the end of the year.
I don’t think this is the very last end
in the Zarbula Zone of the Alps. They
all link to pictures and location data for all of Zarbula's sundials that have
survived, some restored since his time, 1830 to 1876.
Regards, Roger Bailey
--
From: Darek Oczki dhar...@o2.pl
Sent: Sunday, December
the peaks of Atalaia
Point, Madeira.
The remnant of an ancient volcano provided the gnomon for this temporary
moondial, showing the rising moon as a Madeira Pearl
Perhaps this is one reason Madeira is known as the Pearl of the Atlantic.
Solstice Greetings,
Roger Bailey
attachment: AtalaiaMoon1.JPG
sundial is a reproduction as the 1578 original
was severely damaged by the ravages of time, specifically acid rain.
Regards, Roger Bailey
From: Александр Болдырев
Sent: Sunday, February 05, 2012 6:25 AM
To: sundial@uni-koeln.de
Subject: Art-gnomonist co-op
Friends,
Sometimes sculptors cooperate
Pause the video, press print screen to copy the screen to your clipboard,
paste it into your document, email or photo program, and crop the clip as
required.
Roger Bailey
--
From: Richard Mallett 100114@compuserve.com
Sent: Monday, February
.
Regards, Roger Bailey
ps. Mikey likes it was a major TV commercial on a breakfast cereal in the
US. Even I know Mikey lives.
--
From: ruben nohuitol nohui...@hotmail.com
Sent: Saturday, February 11, 2012 11:28 AM
To: sundial@uni-koeln.de
Subject
. Knowledge advanced.
Can you comment on my naive point of view or add more background on the
pioneering work of Georg Peuerbach?
Regards,
Roger Bailey
Walking Shadow Designs---
https://lists.uni-koeln.de/mailman/listinfo/sundial
AM
To: Roger Bailey rtbai...@telus.net; Sundial List
sundial@uni-koeln.de
Cc: Frank King frank.k...@cl.cam.ac.uk
Subject: Re: medieval astronomy (was: Georg of Peuerbach)
Dear Roger,
Sara's message merits serious study!
We here in Europe weren't totally asleep
in medieval times or even
to the phenomenon.
Regards, Roger Bailey
From: Art Krenzel
Sent: Sunday, February 19, 2012 9:55 AM
To: sundial@uni-koeln.de
Subject: The FIRE WATERFALL, Yosemite National P...
A spectacular seasonal sundial for your enjoyment. I hope the photo comes
through. If it does not, I will send
-Shatir dial near Washington DC is gathering momentum. You
will hear more on the topic at the BSS meeting in Cheltenham in April.
Regards,
Roger Bailey
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
Hi Dave,
The key principle to remember is the sun has a diameter of half a degree of
arc, (32'). The sharp umbra shadow projects as a cone, vanishing to nothing
at a distance 1/Tan (32') or 107 times the width of the point. The penumbra
shadow keeps growing wider and dimmer as the distance
. There are many options with this program that allow
you to test your design.
Helmut's program downloads are available here.
http://web.utanet.at/sondereh/sun.htm Alemma is the one for analemmatic
sundials.
Regards,
Roger Bailey
NASS Secretary
Walking Shadow Designs
www.walkingshadow.info
From
Hello again,
The pdf file for your design is so small I attached it. This is the typical
output of Helmut's Alemma program printed to pdf. North is up in this sketch.
The shadow path is for 1 January.
Roger Bailey
From: axel törnvall gonzalez
Sent: Saturday, March 10, 2012 3:07 PM
Hello All,
Helmut's suggestion to incline the gnomon is a good one to solve this problem.
The normal vertical design is less accurate than I originally thought because
the shadow intersects the ellipse at such a small angle. Reasonable time
estimates would be impossible to achieve through most
trigonometry projected
onto the plane of the instrument by plane geometry. Yes, even the simple
traditional method is challenging.
Regards,
Roger Bailey
NASS Secretary
From: محمد الزعبي
Sent: Saturday, March 17, 2012 2:14 AM
To: sundial@uni-koeln.de
Subject: Help about Unequal Hours
Hi
, the derivative, the rate of change, the cosine is at its
maximum at the equinox, and the minimum at the solstices.
Enjoy the rapid change to longer days as we enter spring and approach the long
slow days of summer near the solstice.
Regards, Roger Bailey
Walking Shadow Designs
www.walkingshadow.info
Excellent! Thanks Frank and Fred.
Roger Bailey
From: Fred Sawyer
Sent: Friday, March 30, 2012 11:11 AM
To: Sundial List
Subject: Frank King on radio (online)
The March 28 edition of the Chris Evans Breakfast Show (from BBC Radio 2) can
be heard until April 4 online at:
http
show (pps) file posted here temporarily.
http://www3.telus.net/public/ormerod/NASS2010/ Click on the lower left of the
screen to bring up the speakers notes.
Regards,
Roger Bailey
NASS Secretary
Walking Shadow Designs
.
From: jim senato
Sent: Saturday, April 07, 2012 11:30 AM
To: sundial@uni
evoking the brass
equatorial ring of Ptolemy in the Great Hall in Alexandria and a pair of
quadrants facing east and west, recently restored. The scientific basis for the
calendar reforms was established here, with these sundials and the meridian.
Regards, Roger Bailey
From: Jos Kint
Sent
great
instruments to help reset the calendar but there are too many Santa Maria
churches.
Regards, Roger Bailey
From: Roger Bailey
Sent: Friday, May 04, 2012 7:51 PM
To: Jos Kint ; sundial@uni-koeln.de ; Richard
Subject: Re: Meridian in Siena, Florence
There are also some great sundials
bonuses.
Regards,
Roger Bailey
Walking Shadow Designs---
https://lists.uni-koeln.de/mailman/listinfo/sundial
.
Regards,
Roger Bailey
From: Alexei Pace
Sent: Monday, May 07, 2012 9:54 PM
To: Roger Bailey
Cc: Rafeal Soler Gaya ; Miguel Garcia Arrando
Subject: Re: Independent Invention of Seasonal Markers
Thank you Roger,
Very interesting post indeed.
Are these sundials documented anywhere online?
Best
to seek approval, authorization
or forgiveness later.
Regards Roger Bailey
Life's but a Walking Shadow
--
From: Martina Addiscott martina.addisc...@gmail.com
Sent: Tuesday, May 15, 2012 10:23 AM
To: sundial@uni-koeln.de
Subject: Re: Why
I know nothing about the Beam and Spar Sundial but I do know when the sun
over the yardarm, the bar is open.
Regards, Roger Bailey
--
From: Tom Laidlaw tomlaid...@comcast.net
Sent: Tuesday, May 15, 2012 5:50 PM
To: Kevin Karney ke...@karney.com
the site last month. Let kids
explore and take risks. Perhaps then they will be less interested in
destructive risks later.
Regards, Roger Bailey
--
From: Martina Addiscott martina.addisc...@gmail.com
Sent: Tuesday, May 15, 2012 7:19 AM
To: sundial@uni
like
swings, slides, teeter totters, skipping ropes, analemmatic sundials are such
trivial risks in comparison.
Kids need to grow and develop. Give them space. Let them challenge themselves.
Regards, Roger Bailey
From: Donald Christensen
Sent: Sunday, May 27, 2012 7:29 PM
To: darkro
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