ToClaude Hartman and other people interested.
Images of the sundial of Ibn al Shatir bult in Damascus (1371-1372 - 773
H) can be found:
- in the book of R. Rohr Sundials, history, theory and practice
published by the Toronto Press in 1970
There are one photo (1), the reproduction
The following are the years from 1800 to 2100 in which February has no
full moon. This is taken from Meeus's book.
180919152018
184719342037
186619612067
188519992094
Jim
--- --
Hello all:
Will two full moons always occur in a March that follows a Febuary with no
full moon?
John Carmichael
Tucson
The second March full moon this year occurs at 22:49 UT. Therefore,
if one moves east from London by a couple of time zones March has but
a single full moon this
This reasoning relies on the mean length of a lunation. But the
actual case is more complicated. See my reply to John on this same
subject.
Jim
--- --
| Jim Cobb | 540 Arapeen Dr. #100 | [EMAIL PROTECTED] |
| Parametric
Mark Wrigley [EMAIL PROTECTED] wrote:
Not quite true.
Last month Australia had a full moon at about 2am on Feb 1.
In Europe it was still January.
Quite so. Meeus (careful calculator that he is) explicitly notes his
use of UT (and the dependence of such a calculation on the time zone).
The
Not quite true.
Last month Australia had a full moon at about 2am on Feb 1.
In Europe it was still January.
From: Jim_Cobb [EMAIL PROTECTED]
Reply-To: Jim Cobb [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
CC: sundial@rrz.uni-koeln.de
Subject: Re: A tad off topic?
Date: Fri, 12 Mar 1999 08:44:47
Hello All.
Does anyone have any experiences to share about working with a plasma
cutter to do intricate fretwork designs on gnomons and dial plates? Any
tips or good external references would be appreciated.
Tex Brashear
