know the number 0 !
---------
T. & M. Taudin-Chabot, home email: [EMAIL PROTECTED]
(attachments max 500kB, in case of larger attachments contact me)
> Shouldn't we go back to sundial time? We never need to add a leap second to our watch.
That leap second is only necessary to synchronize our watches with the sundials isn't it?
-
Thibaud Taudin-Chabot
52°18'19.
uld fall on the other arm's scale.
>
>
>A carpenter's square, suitably inscribed, could be used in a similar
>manner.
>
>Cheers,
>Sara Schechner
>39:00 N 77:01 W
>
>
>
-------------
T. & M. Taudin-Chab
: Steve Lelievre [mailto:[EMAIL PROTECTED]
>> > Sent: 07 June 2000 16:29
>> > To: Sundial mailing list
>> > Subject: Water filled sundial at Herstmonceux, England, ...
>> > ...
>> > photo is at http://www.ualberta.ca/~droles/astro/astrav/Sun2.html
>
>
-
T. & M. Taudin-Chabot, home email: [EMAIL PROTECTED]
(attachments max 500kB, in case of larger attachments contact me)
This sundial is designed and manufactured by W.G Benoy (BSS-member). A
model is in the Musieum of Science in London. Years ago I got one from him.
At 12:28 7-6-00 -0300, you wrote:
-Original Message/Oorspronkelijk bericht--
>I just came across a photo of a water filled sundial at
>Do you know of a way to e-mail DC drawing files to somebody who doesn't
have DC?
John,
The answer is. you guessed it: a DXF file. That why the DXF files are
created. DXF stands for Drawing X-change File.
Thibaud
-
Thibaud Taudin
As far as I know it is because in a HPGL file the characters are not
described using their ASCII value but as a bunch of vectors. So it will
always be difficult to see the difference between the character A and three
lines drawn in a way that they resemble the character A.
Thibaud
...
>I myself
that is called convincing evidence. The only thing what is till missing is
a picture of the result with and without.
>One of the great things about this list is the opportunity it affords to
>admit when you (me) are mistaken. I have played around with a shadow
>sharpener, and can now see that
it is simple:
.prn is for a print file. Normally they are files that are made for a
specific printer on a pc and printed on an other pc that has that specific
printer.
.plt files are plotfiles made by a drawing application.
.hgl are a special kind of plotfiles: they are written in HPGL.
About HPGL
The largest bowls can be found in Jaipur, India. You have to go into them
to be able to read the place of the shadow.
At 16:36 8-4-00 +0200, you wrote:
-Original Message/Oorspronkelijk bericht--
>Dear Diallists,
>
>Is there someone who knows the existence of some dials made around
A HPGL file is gets often .plt extension, that is all. Sometimes .hgl is
also used as extension. So: PLT is not a file format.
My MS Word can read a .plt file (thanks to a nice filter) and the result is
a nice vectored picture in a document that can be scaled to any size
without losing resolution
it is simple arithmetic: our watch shows mean time, so the mean of the
correction should be 0, otherwise your watch is fast or slow after a year.
At 23:02 3-4-00 EDT, you wrote:
-Original Message/Oorspronkelijk bericht--
>4/3/00
>Does anyone know why the equation of time is index
As you could have seen in this list ther were some questions about the
correctness of the meanvalues I published. After a thorough check I found
indeed a small typing error somewhere in the program. So I made a corrected
version of the list which is now published on:
http://www.chabot.demon.nl/sun
Check with a local architect. He has more or less the same problem and I am
sure he can plot his files. Perhaps there is one just around your corner
At 08:59 16-3-00 -0700, you wrote:
-Original Message/Oorspronkelijk bericht--
>Hi Steve:
>
>Glad you got the package, and thanks
This actually something like the old way of determing the longitude (before
there were accurate timekeeping instruments). It is called the Lunar
Distance Method. I am sure there will be a number of references on the web.
At 08:12 16-3-00 -0700, you wrote:
-Original Message/Oorspronkelijk beri
Sometimes a HPGL plotfile can do the trick. Plot to a file as if the plotter is a HP7500 plotter. There are application that can read plotfiles, my version of MS Word has an import filter.
At 14:23 16-3-00 -, you wrote:
-Original Message/Oorspronkelijk bericht--
Colleagues
>Yvone Masse's design described as the second dial in his article "Two Mean
>Analemmatic Sundials" in the NASS Compendium of December 1997.
I found it in the Compendium of March 1998 page 10.
-
Thibaud Taudin-Chabot
52°18'19.85" Nor
It is not a sundial, but did you ever see a beautiful watch? Look at:
http://www.klaauwwatches.nl/index.htm
-
Thibaud Taudin-Chabot
52°18'19.85" North 04°51'09.45" East
home email: [EMAIL PROTECTED]
(attachments max. 500kB; for larg
use the program DIALIST (published by NASS) to find out when it is local
noon at the date you want. At that date and time, perpendicular to the
direction of the sun (stick in the ground and its shadow) is your east west
line.
Thibaud
At 22:42 6-3-00 +0100, you wrote:
-Original Message/Oorspro
There is an article about 'The sellotape sundial', which is in fact a
polarization sundial, in the BSS Bulletin of Feb 98, page 3.
Thibaud
At 06:24 7-3-00 -0600, you wrote:
-Original Message/Oorspronkelijk bericht--
>This is one last attempt to find someone out there with
>inform
Because I always forgot in which font are which nice characters to be used
for sundials I gathered those characters and put them into 1 font: sundial.ttf
You can find it on http://www.chabot.demon.nl/sundials/index3.htm
I did find out exactly yet how I should have programmed it on that page to
ge
At 19:36 1-3-00 +0100, you wrote:
-Original Message/Oorspronkelijk bericht--
>How can a diallist use a GPS receiver to mesure the declination of a
>wall ?
if it is a very long straight wall you can walk along the wall and find out
the course of this movement. Then deduct or add 90
>I can see that in abstract terms that we have dials which are
>
>- projection of a point onto a surface (perhaps curved)
>- projection of a line (perhaps curved) onto a surface (perhaps curved)
>- projection of two lines (perhaps curved) onto a surface (perhaps curved)
>- other non-projection typ
>I don't like the idea of something being 'partly universal'. It seems to
me things are either universal or they are not.
Perhaps 'limited universal' will do, or 'universal within limits'?
-
Thibaud Taudin-Chabot
52°18'19.85" North
For sundial design purposes I had a table made by the mainframe computer of
my employer.
This table gives for every day in the year the mean values of the
declination and timeequation measured over the coming century: 2000 - 2099.
The values are for 12:00 GMT(noon).
I used the original formulas
...
>Another way to solve the gnomon height problem might be to make the inner
>ring the June ring, when the sun is highest and the shadow the shortest. The
>next ring would be July followed by May, August, April, Sept, March, Oct,
>Feb, Nov, Jan, and December as the outer ring. This ring order w
Once an US engineer told me: but we are using decimal measurements: decimal
inches!
-
Thibaud Taudin-Chabot
52°18'19.85" North 04°51'09.45" East
home email: [EMAIL PROTECTED]
(attachments max. 500kB; for larger attachments contact m
Depends on the latitude (and sun declination). I learned each finger is 15
minutes and I was navigating around 52°N.
At 13:17 24-1-00 +0100, you wrote:
-Original Message/Oorspronkelijk bericht--
>When I was a deck cadet my chief officer told me the rule to calculate tha
>approxima
Have a look at
http://www.longnow.org/
they try to make a clock which would last 10 000 of years or more with an
accuracy of 1 day in 20 000 years.
I would say a sundial could do that job and even more accrate I guess.
Perhaps even a new scale could be developed to indicate the millenium
number. I
gt;What happens to the e. of t. in a leap year?
>Should we have a new e. of t. each year?
>
>Thanks for your help.
>
>Carpe horam
>
>Peter Ransom<
>
>
-
T. & M. Taudin-Chabot, home email: [EMAIL PROTECTED]
(attachments max 500kB, in case of larger attachments contact me)
At 20:02 19-11-99 -, you wrote:
-Original Message/Oorspronkelijk bericht--
...
>The key is to get a good quality photoresist that doesn't fail - the aerosol
>type has a very limited shelf-life, I've found.
>
any experience with a 'permanent' marker pen? If you use this for
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