Title: Message
Dear
All,
Yesterday I was
looking at the nice sharp shadowof an ice scupture about 3 foot high and I
realised that it would be possible to make a sundial out of ice! Does
anyone know if this has been done and are there any photos on the
web?
Thanks
David
Title: Message
Dear
All,
Thought you may like
this ... http://www.wired.com/news/technology/0,1282,65428,00.html
David
For sun related
calculation needs ... visithttp://www.sunlitdesign.com/products/thesunapi/
Hello Gianni, Fer and John,
Yes you are correct. December 22-23. I had another look at my spreadsheet
and found that I had misread it.
All the best
David
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Gianni Ferrari
Sent: Saturday, 14 June
Dear Alain,
Check out www.sunlitdesign.com/products/thesunapi
David
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Alain MORY
Sent: Saturday, 14 September 2002 3:51 AM
To: sundial@rrz.uni-koeln.de
Subject: seeking for an azimuth software
Hello !
Dear All,
While I normally live in Kazakhstan, I am currently in Australia. I
would love to hear (off list) from anyone in Australia with an interest
in Sundials. You can email me at mailto:[EMAIL PROTECTED] or phone me
in Sydney (02) 9585 2565
Thanks
David Pratten
www.sunlitdesign.com
Title: Message
Dear
All,
I will
take an intuitivepunt on any point on the arctic circle as having maximum
ratio of southern exposure to northern exposure. Can't prove
it.
David
-Original Message-From:
[EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Anselmo
The BSS sundial glossary has the following entry under Types of Dials:
reflecting ~: these dials have no gnomon, but reflect sunlight by means
of a semi-cylindrical mirror, set with the axis of the mirror parallel
to the polar axis. The mirror reflects the light to form a caustic curve
amongst
Title: Message
Dear
Dialists,
I have been
pondering the effect of refraction on dial performance.
Refraction quoted at
.1 degree to .5 degree apparent difference in altitude below 10 degrees of
altitude, will impact the hour angle to some degree. See
Title: Message
Dear
Dialists,
Merry Christmas -
and did it pass us unnoticed? Today at 2001/12/25 05:32:02 [UT] our dials
and our watchesare running in synchronisation!
David
www.sunlitdesign.com
Dear Walter,
Greetings.
There is another factor which limits sundial accuracy to about +/-22
seconds. This is the variation in the value of Equation of Time from
year to year within a leap cycle. See
www.sunlitdesign.com/infosearch/sundialaccuracy.htm
David
www.sunlitdesign.com
Dear Fritz,
Using Find Annual Feature function (sdxFindAnnFeatx)of the The SUN API
www.sunlitdesign.com/products/thesunapi I get the follwing value for the
solstice this December:
December 21 19:21:30.7143 [UT] (which is +/- 10 seconds of the true
value)
Compare with
Mounting the sundial upside down so that the face is oriented as for
Britian will make the hour numbers go the right way ...
David
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of The Shaws
Sent: Wednesday, 12 December 2001 10:06 PM
To: [EMAIL
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