I am not aware of anybody building a scaled down version, but there is
nothing to keep anyone from doing so. The design not under patent, so there
are no
restrictions on it, at least as far as I know. Richard Schmoyer's original
description, with some how to advice, was published in
I looked this up a long time ago for the continental USA and came up with
this info re: the extremes of local time within time zones:
EST 75deg. Meridian. Range 15deg. west, 8 deg. east of meridian.
CST 90 deg. Range 15w, 5.5e
MST 105deg. Range 13.5w, 5e
PST 120 deg. Range 5w, 6e.
I do not
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
Dear Sundial Buddies,
I put a 2-second high resolution movie of a sundial cannon firing at www.precisionsundials.com/sundial_list.htm. Its pretty cool. Waiting for it to go off was like watching the grass grow, however.
-Bill
---
There is a large monument in Ecuador that marks the exact location of the equator, so they claim. Google Earth puts it about 780 feet south of the equator. Any thoughts on who is more accurate: Google Earth or the Ecuadorian surveyors?
It's location on Google Earth is Lat: -0.002166 degrees,
Bob, here is my guess. If the wall is facing West, then the layout looks like it could show the summer and winter solstice declination lines for a vertical dial. So, it may mark the sostices, but I do not think it registers the time.
-Bill
---
In a message dated 5/13/2006 10:54:23 AM Eastern Standard Time, [EMAIL PROTECTED] writes:
I have been involved in a "sundial business" for about a year and a half.
The best way to make a small fortune in a sundial business is to start with
a large one. Good luck!!
Paul
Amen to that. -Bill
In a message dated 5/14/2006 3:09:42 PM Eastern Standard Time, [EMAIL PROTECTED] writes:
instrument_11, instrument_12 - I can see a small sundial, and
quadrant, but altogether what's that ?
Looks like a device for measuring the altitude and azimuth of the sun at a time shown on the
In a message dated 5/9/2006 7:37:22 PM Eastern Standard Time, [EMAIL PROTECTED] writes:
My view? No problem having it as a side line but don't rely on it as the
basis for a specific income supplement!
Patrick
Amen.
Bill Gottesman
---
I think I did see photos of one from South Africa in an e-mail about 2 years ago from someone who wanted to know more about a sundial they had. It looked alot like a cross between a Pilkington and Gibbs Sol Horometer and their better known Heliochronometer as I recall. I could kick myself in that
Tony Moss of Lindisfarne Sundials sent me some photos of different models of Homan's sundials. I have placed them for viewing at www.precisionsundials.com/sundial_list.htm.
-Bill
The answer is yes. I think it was called Homan's Heliochronometer, and was made in South Aftrica. Google was not that helpful.
-Bill Gottesman
In a message dated 11/14/2005 9:00:23 PM Eastern Standard Time, [EMAIL PROTECTED] writes:
Hi all:
I have a question for list members. Does anyone know
Yesterday I took a time lapse movie of the beams of light at Kate Pond's Odyssey of Light sculpture in South Burlington, Vermont. It was the day before the Equinox. The movie compresses 80 minutes into 5 seconds, and can be seen at
www.precisionsundials.com/consult.htm
It is 4.5 megabytes,
-Bill Gottesman
n a message dated 9/19/2005 11:44:42 AM Eastern Standard Time, [EMAIL PROTECTED] writes:
Hi David,
The equation you quoted is correct. Cos t = Tan Dec / tan Lat. It is easier to
calculate than it looks with a simple scientific calculator. As simple
program or spreadsheet
-Bill
In a message dated 9/16/2005 5:01:34 AM Eastern Standard Time, [EMAIL PROTECTED] writes:
Subj: Is it possible to determine when the sun is due East West?
Date:9/16/2005 5:01:34 AM Eastern Standard Time
From:[EMAIL PROTECTED]
To:sundial@rrz.uni-koeln.de
Received from Internet:
At
-Bill
In a message dated 9/12/2005 12:01:44 PM Eastern Standard Time, [EMAIL PROTECTED] writes:
But I am waiting for NASA to send a spaceship to
Mercury's surface, because a sundial there would
be most curious... do you guess why?
Best regards,
Anselmo Perez Serrada
In a message dated 6/10/2005 2:53:51 PM Eastern Standard Time, [EMAIL PROTECTED] writes:
Does anyone know how mean time is set up?
To clarify, I know that local mean time has 24 hours every day set for a mean daily rotation for any particular location. I understand that timezones are set up
-Bill
In a message dated 4/9/2005 11:58:53 AM Eastern Standard Time, [EMAIL PROTECTED] writes:
Hi Anselmo all,
In my webpage www.fransmaes.nl/sundials/ - "Analemmatic" - "extra info" -
"The human scale", I calculated the shadow paths for a 2 meter gnomon (human
with hands above head) in dials
-Bill
In a message dated 4/8/2005 2:28:14 AM Eastern Standard Time, [EMAIL PROTECTED] writes:
As you all know, for latitudes about 40 deg, the least longitude
of the style equals more or less the major semiaxis of the ellipse
so that the shadow can reach the ellipse on the worst case, this
A sundial cupola is a terrific idea, I'm all in favor of it. I hope you not talking about stained glass sundials, but the more common type of external sundial. If I had a cupola on my house, there is no question I would do the same thing. I love it.
-Bill
I found out about the sundial mailing list from "Sundials on the Internet"
My wife has been given a sundial and before fixing it I have done some
investigation. Only one problem - the upper surface of the gnomen is
convex - how do I measure the angle of the gnomen ?
If I measure in a
I wrote a program that determines declination of a vertical wall using just a
watch and a carpenter's square. It gives very accurate results if performed
when the square's shadow is long. Be certain to follow directions closely,
and measure the edge of the shadow as described in the method.
In a message dated 11/2/2004 5:44:15 AM Eastern Standard Time,
[EMAIL PROTECTED] writes:
I believe (purely as conjecture I must say) that they were part of the
laying out and indeed the marking process and not only denoted the
gnomon corners but took pins against which a rule was laid. Other
John C. et al,
You should be able to copy the picture on your screen using the PrtScn
button near the top of most keyboards. This puts the screen image on your clip
board, which you can then paste and edit in photoshop or Word or any other
similar software. Pressing Alt-PrtScn is supposed
My own preference is for a flat circular disk, oriented parallel to the dial
face. This nodus produces a circular, not elliptical, shadow at all times and
dates (i.e. regardless of the sun's position). This may seem counter
intuitive, but it is true.
-Bill Gottesman
In a message dated
Silas is (last I knew) still making sundials under the name of Connoisseur
Sundials. Try the link below:
A HREF=http://www.sundials.co.uk/connois.htm;Click here: Connoisseur
Sundials Home Page/A
Bill Gottesman
-
Dear Dialist,
I am trying to obtain some historical information on the Schmoyer Sunquest
sundial; specifically when it was first made and marketed. Waugh's book (1973)
discusses the dial, but gives no dates. Apparantly Frank Cousin's book (1968)
mentions it, but I do not have a copy. I was
In a message dated 3/21/2004 6:51:34 AM Eastern Standard Time,
[EMAIL PROTECTED] writes:
It is not currently planned to produce an on-line version [of the BSS
glossary], simply because of
the work involved in producing a web-compatible version.
A loss for the rest of us. The first version
Dear Listmembers,
Here is a link to a New York Times from February 19 article that describes a
California bridge that doubles as a sundial. Details are scant, but I think
Fred Sawyer had a hand in adapting its design to sundialling.
-Bill Gottesman
A
I'll take a stab at this. I have attached a 7KB .gif, which I hope the list
allows. 20 degrees of latitude of the spheroid near the poles is a larger
ANGULAR distance, as measured by the celestial sphere, than at the spheroid's
equator. I am guessing that they meant angular distance as
Tony, it impugns your image to think of you as half asleep. For the record,
I prefer to think that you were half awake.
-Bill
In a message dated 2/3/2004 9:15:50 AM Eastern Standard Time,
[EMAIL PROTECTED] writes:
Subj: Was I half asleep?
Date:2/3/2004 9:15:50 AM Eastern Standard
As far as I can tell, there is a noon gap in the dial commensurate with the
gnomon thickness.
-Bill
In a message dated 1/21/2004 4:42:56 AM Eastern Standard Time, [EMAIL
PROTECTED]
writes:
She is a beauty isn't she?
Very original way of positioning the style. That style has a certain
Dear Sundial-list members,
Richard Schmoyer's daughter, Laurel Browning, sent me a photo of a
(unfinished?) dial her dad was working on before he died. She has no
information about
it. It can be seen at www.precisionsundial.com/sundial_list.htm. Any
thoughts on what he was building?
A
The prior note was sent with a misleading title by error-it was not a
solicitation to buy a dial. The Web Address was also misprinted and is
corrected
below.
Dear Sundial-list members,
Richard Schmoyer's daughter, Laurel Browning, sent me a photo of a
(unfinished?) dial her dad was working
The cone of the dial is facing upwards, because that is the way Mr.
Schmoyer's daughter took the picture. She is not a sundialist, and did not
know how to
position the dial. In use above a door, the dial would be turned over so
that the cone curved downward. This way the numbers will be
Good, Mike. A fine example of thinking outside the house.
-Bill
In a message dated 1/9/2004 4:18:28 AM Eastern Standard Time,
[EMAIL PROTECTED] writes:
Tom,
Instead of demolishing your neighbour's 2nd floor, consider adding a third
floor to your own house. This could have additional
In a message dated 12/24/2003 4:49:21 PM Eastern Standard Time,
[EMAIL PROTECTED] writes:
That looks lovely! Thanks for sharing with us. Do you have any idea
of how many hours you've spent developing this focused cursor?
I don't, other than way too many. BG
-
How about getting a stainless steel (or mirrored glass) gazing ball (maybe 50
to $100), and then have it sandblasted to give it a matt finish? You could
even mask off the markings, such as hour lines and numerals.
-Bill
In a message dated 10/13/2003 5:36:39 AM Eastern Daylight Time,
[EMAIL
Tomorrow is the equinox (at least for my longitude), and today I took a
time-lapse movie of the beams of light crossing at Kate Pond's Odyssey of Light
at
solar noon. Tomorrow will be overcast, which is why I couldn't wait for the
genuine equinox date. It was a bit overcast today as well,
Helmut, Impressive and useful program. Looks like it took a lot of work.
-Bill
In a message dated 9/9/2003 3:12:37 PM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
http://web.utanet.at/sondereh
-
Now that CardinalDirections.exe is running so nicely, it was not hard to
adapt the code to perform calculations for accurately measuring the declination
of
a vertical wall. The method is simple, requiring just a carpenter's square
and a watch. You can check it out by downloading
I want to thank everyone who tried the program and gave feedback. It was
very helpful to me, and I think made a better program. I have added a print
button, and am very satisfied with how CardinalDirections has turned out.
Anselmo
is correct that the program does not calculate the passage
Good idea, thank you. I have now added this to the display.- Bill
In a message dated 8/30/2003 5:44:48 AM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
One thing that would be nice (I know, everybody is asking things of you..)
is some feedback on the date input.
(So that, when I input
CardinalDirections uses Jean Meeus' formulas from Astronomical Algorithms.
I ran your [Patrick Powers] numbers through NASS's The Dialist Companion.
It gives the sun east at 7:32:33 AM (3 second difference), south at 1:01:20 PM
(1 second difference), and west at 6:30:40 PM, a 3 second
My programming skills are limited to microsoft visual basic. I regret that I
have no Macintosh skills.-Bill
In a message dated 8/29/2003 11:26:48 AM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Bill,
Can jou change CardinalDirections into a format available for Macintosh
users?
I have tried to incorporate the suggestions so far received. I think I have
fixed the font problem, so it should display fine, I hope. I added EoT and
Declination data, and found and fixed a small mathematical error. I have not
added any time zones that are offset by 30 minutes, but maybe
I just finished writing a tidy little program that calculates when the sun is
exactly south (or north), east and west for any given date and location. I
wrote it to help mark a cardinal direction for laying out analemmatic dials,
but it can help orient any sundial. Using the vertical string
I just put some pic's on my website [www.precisionsundials.com/consult.htm]
of an analemmatic I made for a local school. It was inspired by Fabio Savian's
Tree Analemmatic concept. I used apples to mark the hours, and put a worm in
the 8:00AM apple to show when school begins (8:10). This
The illustrations are very nice in the booklet noted below, but they make
extensive use of copyrighted Charlie Brown/Lucy/Snoopy Peanuts characters,
which
appear to be pirated. I really don't know whether this is OK legally or
ethically, but my hunch is that it is not. Any opnions from the
For an idea of what can be done with glass, check out Jim Tallman's dials at:
http://www.artisanindustrials.com/spectra.html
They are sandblasted (or etched?), but could lend ideas for stained glass as
well.
-Bill
-
The term Tony used is Midnight Overlap, not gap. Give it some thought-the
shadows cast by the edges of a thick gnomon overlap at midnight, and do not
form a gap as they do at noon. Recall that from 6pm to midnight it is the east
rather than west edge of the gnomon that casts the shadow, and
In a message dated 6/17/2003 10:45:30 AM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Hi Bill
I think you have convinced me that solar noon is the best time to set a
dial, but what is the best date?
My off-the-cuff answer is any date is fine if you are using the solar noon
method.
I have given this question quite a bit of thought over the past 3 years,
because the focusing sundial I sell is readable to a few seconds. It will not
live
up to its accuracy unless set properly.
If a dial is well made, and matched to its latitude, then it only has to be
levelled and
John and company,
There was an entry on the NASS message board on 5/27 by Joe Cahak about a
program he has designed which includes a solar calculator based on Meese'
algortihms. Check out his message and his web-site. It may have what you
need. On
a different note, for what purpose do you
the NASS dialist companion will give you solar noon to the second. I think
it is free at the NASS website. If not, I can run it for you.
Bill Gottesman
In a message dated 3/23/2003 5:53:38 PM Eastern Standard Time,
[EMAIL PROTECTED] writes:
Hi Gordon:
I'm looking for time down to
I had thought a civil gnomon was possible, and that it would be a complex 3-D
structure. I tried to model it with 3-D software called Pro-Desktop, a free
demo for a very expensive 3-D CAD software. After taking a few nights to
learn the product, I found it unsuitable for this purpose, and
I really enjoyed meeting Ron at the Montreal NASS convention. I had been
looking forward to seeing him in Tuscon. I am so sorry to hear he died.
It gives me pause to reflect, and a lot of sundial mottos come to mind.
Bill G.
-
Colleen,
First you need to determine with some accuracy the direction your wall faces.
There are many ways to do this. One way is to visit
http://www.precisionsundials.com/software.htm
and down load the instructions in walldeclination.doc, and the accompanying
spreadsheet. I would
In a message dated 12/11/2002 5:49:44 AM Eastern Standard Time,
[EMAIL PROTECTED] writes:
I would be delighted to receive any comments or suggestions from any
cognoscenti in these matters.
Tony, I too had some problems with sending .dxf files for waterjet cutting.
Some circles made in
If your product is in big demand, then you can command a 100% payment. I
prefer to ask for 50%, so that the customer feels I'm dealing with them in
good faith. But I have very little experience in this.
Jim Tallman should ask for 100%, because his dials are under $200, and full
payment is
Now that is a clever original idea that I would like to see. Hats off to you
Mac. -Bill
In a message dated 10/24/2002 7:33:17 PM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
If you put the gnomon on a sliding block, you could then easily make
an analemmatic dial with hour lines.
Yes. The WallDeclination.doc on the website complements the spreadsheet, and
specifies that this method works only for vertical walls.
-Bill
In a message dated 10/22/2002 3:39:23 AM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
I guess that you assume the inclination of the wall is
In a message dated 10/20/2002 6:19:28 PM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
http://perso.wanadoo.fr/jean-paul.cornec/disk.htm
I think it is very likely an altitude sundial. The holes on the right cover
roughly 90 degrees. In my opinion they reflect the sun's declination (to
In a message dated 10/19/2002 4:05:59 PM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
She dosn't however consider that the digital sundial should be recorded
as an entirely new design. It is a read-out of the conventional vertical
sundial and just a convenient addition to help in the
In a message dated 10/16/2002 1:20:43 AM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
I'm especially intrigued to know of designs that do
not require any alignment interaction nor adding or subtracting minutes
to compensate for the EoT (the heliochronometers mentioned above are
Roger Bailey has adapted my MSworks (or, more aptly, MSdoesntworks)
spreadsheet for finding wall declination to Excel Format. It is available at
www.precisionsundials.com/software.htm, along with a word document explaining
the method.
-Bill G.
-
I will not permit my ignorance to prevent me from entering into this
stonecaraving discussion!
I have seen advertisements for pneumatic turbine pencils that rotate at
400,000 RPMs, and take 1/16 bits. They claim to cut as effortlessly as
writing with a pencil. Any experience out there using
I have put the corrected method for finding wall declination on my website
(the handout from the NASS conference had significant errors). Go to
www.precisionsundials.com/software.htm and download Wall Declination.doc.
It is an MSWord Document. You can also download an MSWorks spreadsheet to
Dear 2002 Conference attendees,
John Carmichael tried my wall declination formula, and it did not work
because I mistakenly put a minus sign where it didn't belong. I'm sorry to
make an error in a method that was supposed to be so simple.
The Correct formula is
Wall Dec. = A
Hi all.
I need to brighten the dark patina on my large bronze focusing dial for a
photoshoot.I do not want to use anything abrasive, especially because I
do not want to accidentally scratch the mirrors or abrade the cast bronze
surface. I have tried Tarn-X and muriatic acid. Both
I can't seem to reach Roger Bailey ([EMAIL PROTECTED])
I keep getting the following message. Any suggestions? Bill G.
- The following addresses had permanent fatal errors -
[EMAIL PROTECTED]
- Transcript of session follows -
... while talking to ns.expertcanmore.net.:
I like Roger Bailey's idea for Eot correction in the hour markers themselves.
It is simple, practical, and original.
Bill G.
-
Steve, T.-
Laser etching is fantastic on anodised aluminum, but this may not be the
material of your choice. It works also on stone, and I have hired someone to
do this for my early granite Sawyer Equants, but believe it or not, sand
blasting gave cleaner results and was cheaper. The
In a message dated 7/18/2002 11:21:38 AM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
I am trying to make a dial that is easy for regular people to understand
and use, and I think some kind of label along the time scales would be
helpful to casual observers.
Good luck. I have not
Isn't a dial like this called something like a Hemispherium?
Bill G.
In a message dated 7/16/2002 2:06:26 AM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Dear listmembers,
I found an interesting description of a sundial in Josephus Flavius,
Against Apion, Book 2, 2 (trans. W.
I did not get an attachment. Bill
In a message dated 4/20/2002 11:36:11 AM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Here's a jpeg of the drawing, Im leaving town for the next couple of days i
will explain it when i get back. the center cylinder is the alidade
Dave Scott
lat.
David Scott,
Could you refer us to a photo of this dial (or attach a small JPEG)? I am
having a hard time visualizing it in terms of your question.
Bill Gottesman
Burlington, VT
44.4674N, 73.2027W
-
I put a few sketches of why the Sawyer Equant dial works on my website at
www.precisionsundials.com/why it works.htm
Bill
-
In a message dated 3/26/2002 6:11:55 AM Eastern Standard Time,
[EMAIL PROTECTED] writes:
2.
I describe a difference between two parts of the elliptical orbit of the
earth
which are symmetrical with regard to the sun. It is not the difference
between
winter and to summer but the the
Polaris, the North Star, is often suggested for sundial alignment. This
fairly bright star is pretty close to north, perhaps a half a degree off
the
polar axis, generally available in the northern hemisphere and easy to find
in the sky.
I hope this is useful for any of you
In the recent Nass Compendium (V9 #1) is a very neat article by Karen
Robinson on how to tell time and find north by positioning your hands to
mimic a Ring Dial. Its one of the coolest things you can do with your hands.
Check it out. Bill G.
-
Heavensabove.com has a link for precise time.
Bill G
In a message dated 3/7/2002 2:48:09 PM Eastern Standard Time,
[EMAIL PROTECTED] writes:
Hello All,
Where are the best current places online to get the precise time? The
site
I used to use does not seem to work anymore.
Does
In a message dated 2/21/2002 8:17:07 AM Eastern Standard Time,
[EMAIL PROTECTED] writes:
The hourlines in the vertical plane however must come together in one
point, I think. (http://batonline.com/renonciat/instalat/cadran.htm)
I agree. They should converge at a point high up, where
In a message dated 1/25/2002 10:30:31 AM Eastern Standard Time,
[EMAIL PROTECTED] writes:
Theoretically, the gnomon (or style) of a properly
oriented equatorial sundial will not cast a shadow on the dial plate
during the
Equinoxes. I'm told (by a local sundial expert) that it should be
In a message dated 1/8/2002 4:19:42 AM Eastern Standard Time,
[EMAIL PROTECTED] writes:
Since a caustic is a very different animal from an image, is there any
chance of getting around the 2 minute limit on sundial accuracy due to the
sun's angular diameter?
Art, I can't address the
In a message dated 1/7/2002 5:59:27 AM Eastern Standard Time,
[EMAIL PROTECTED] writes:
It is also worth recording that many of us also experienced the year 1961,
which reads the same when viewed normally or upside down; an inverted
palindrome, perhaps? There have only been three other
Is there a site we can view a photo of this? Bill G.
In a message dated 12/24/2001 8:13:47 AM Eastern Standard Time,
[EMAIL PROTECTED] writes:
Congratulation to
Yukio ONO!
Yukio ONO, Tokyo, has won the first prize in the International sundial
competition (section Professionals) LE
Interesting question. I too would be interested in an answer (other than the
spot shadow sharpener which has been discussed at length in the past).
-Bill Gottesman
In a message dated 12/22/2001 8:46:59 PM Eastern Standard Time,
[EMAIL PROTECTED] writes:
Accurate Diaists ,
Maybe this is
Patrick powers is correct in noting that the 0.5 degree width of the sun
(corresponding to 2 minutes of time) creates a shadow penumbra that is
virtually impossible to read to the second. But, a sharp edge can be
achieved by a focusing dial, which creates an crisply defined image of the
sun,
Is there something wrong with the list? It seems that Edley is responding to
a message about a Dodwell dial, but I never received it.
Bill Gottesman
Burlington, VT
In a message dated 12/19/2001 4:41:11 AM Eastern Standard Time,
[EMAIL PROTECTED] writes:
Date:12/19/2001 4:41:11 AM
Does anyone know if this indeed is a sundial, or just a time sculpture? The
dial has only 12 hours around its circumference. Most dials have 24 hours
around the perimeter, and although it is possible to design one with just 12
hours, they are rarely made this way. In such a dial, the gnomon
Now that the sun's declination exceeds -15 degrees, I would invite people to
try out a sundial alignment program I wrote. This program works best near
the solstices, but could be used now, with a little less accracy. Download
SundialAlign! free at www.precisionsundials.com. It is self
Hello All,
Those of you at the NASS Montreal convention will recall my presentation on a
new method for aligning a sundial, including a nifty program which makes the
process simple. Even if you forgot everything I said, I think you will still
recall my struggle with the bowling ball
Saturday Night:
Greetings Everybody,
I just returned from the NASS conference in Montreal. It ended half a day
early because with the absence of some of the speakers, the agenda was
shorter. It was great to see everyone-some new faces, some familiar. Many
Quebec Sundial society members
Thank you to all who gave advice about the gluing dissimilar materials. We
are testing a type of adhesive tape used in window installations, various
silicon glues, and epoxy. So far we like the tape the best.
Bill G.
Well, my guess about the diagonal line is that the wall declines to the south
east, and that the diagonal line defines the shadow path of the style's tip
on the equinoxes. I ain't got no idea what the numbers are all about. Bill
Gottesman, Burlington, VT
In a message dated 8/13/2001 7:46:08
I was looking up the time of the autumnal equinox this year, using the NASS
dialist companion (version 1.1) to determine when declination=0. The value
(approximately 18:40 Eastern Daylight time on 9/22) differs by 25 minutes
from the value given at most other websites (such as
Well, all sundials (except rare focusing dials) cast a shadow whose blurred
edge is 2 minutes of time wide, corresponding to the 2 minute (of time) width
of the sun. This effect is just more noticable in large dials, but does not
enhace or lessen their accuracy.
-Bill Gottesman, Burlington,
I believe that Adobe Illustrator version 9 for windows exports to dxf. Maybe
the latest version for Mac does the same. Check out thier website. Bill G.
Vermont has Cloudy skies for at least the next 3 days Aughhh!
Bill Gottesman
Burlington, VT
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