fer j. de vries [EMAIL PROTECTED] writes:
Back to the bifilar dial : A bifilar dial can be constructed in such
a way that the hourlines ( for local suntime ) are equi-angular
spaced. Than it is also possible to correct for EoT and/or
longitude by rotating the hourscale. So we have at least
Arthur,
The first dial you described was invented in the first half of the 17th
century by Samuel Foster in London. It was subsequently rediscovered by
J.H. Lambert, and has had a number of subsequent rediscoveries since. See
my article:
Fred Sawyer, A Self-Orienting Equiangular Sundial,
Arthur,
I spent many idle hour trying to come up with a sundial that would allow an
easy
mechanical correction for the equation of time.
Let me then alert you to an article that is currently projected for the June
issue
of the Compendium: Kratzer Layout, Yabashi Point Sawyer Equant. The
, 1.043E
email: [EMAIL PROTECTED]
- Original Message -
From: Gianni Ferrari [EMAIL PROTECTED]
To: Sundial List sundial@rrz.uni-koeln.de
Sent: 25 February 2000 14:18
Subject: Azimutha Sundial (once more)
Hi all,
I have read with a lot of interest the numerous messages dealing
sundial@rrz.uni-koeln.de
Sent: Friday, February 25, 2000 9:24 PM
Subject: Re: Azimutha Sundial (once more)
P.S. Come to think of it, surely a bi-filar can never incorporate EoT
adjustment because each shadow point represents two instants in the year,
doesn't it?
Gianni wrote:
Since I could not call azimuthal these solar clocks (because they don't
have
this characteristic even if their shape look like azimuthal) I have
called them (in my program with which them can be calculated) Monofilar
since the shadow is made only from one style or thread
