Hi Mac and all,
I am afraid I don't quite understand the question. John would not like
analemma shaped hour lines, you wrote. How might figure-8 shaped hour lines
be used here??
One can simply incorporate the EoT into the hour lines of a common polar
dial as a function of date, running from
Hello Frans, and sundial list members --
Thanks for your interest.
I apologize for any confusion caused by my use of the phrase for use
with straight hour lines. The words were mine, not John Close's, and
I guess I was trying to reinforce his desire to have a polar dial
which didn't use
P.S. Bill Gottesman has sketched a possible solution and has given
permission to share. Contact me OFF LIST if you want a copy of his
drawing (16K gif).
I would like to see that drawing, Mac!
I can imagine how such a gnomon would work and might look, but believe it
would need to be split
Hi Folks,
I feel that I should comment on this as it was me that initially told John
Close that he couldn't achieve what he wanted in any simple way, when he came
for a day's tutorial (he's a relative novice at dialling).
The problem is that a polar dial is not equiangular or have equally
Hello Friends,
With respect, I have to disagree with John Davis. If you rotate a
polar dial around its polar axis (or any axis parallel to the
Earth's--an edge of the dial plate, for instance) by 15°, each hour
line will be one hour off--ahead or behind depending upon which way
you turned
On Mon, 23 Dec 2002, Mac Oglesby wrote:
With respect, I have to disagree with John Davis. If you rotate a
polar dial around its polar axis (or any axis parallel to the
Earth's--an edge of the dial plate, for instance)
(Which of course, IS rotation about the gnomon axis, PLUS translation in
