photographs. Sorry.
Best wishes
Chris
- Original Message -
*From:* Alex Ware [EMAIL PROTECTED]
*To:* sundial@uni-koeln.de
*Sent:* Friday, October 10, 2008 8:27 PM
*Subject:* Homogeneous Analemmatic Sundial: Progress and a few questions
Hi again,
I've started construction on my
Hi again,
I've started construction on my sundial, and have a couple of questions.
But first, some pictures of its current state :)
http://www.zooomr.com/photos/axelw/sets/38718/
(quick note:
http://www.analemma.nl/homogeneous%20analemmatic%20sundials%20v2.1%20pdf.pdfby
Hendrik Hollander is the
(date scale)
disk. So I think I must not be understanding your photographs. Sorry.
Best wishes
Chris
- Original Message -
From: Alex Ware
To: sundial@uni-koeln.de
Sent: Friday, October 10, 2008 8:27 PM
Subject: Homogeneous Analemmatic Sundial: Progress and a few questions
PROTECTED] or [EMAIL PROTECTED]
Hompage Still working on it.
*
Hi Warren,
A few questions
Many replies.
Here is another one.
As Luke J Coletti already replied it is normally not done using the classic
formulas.
I looked
At 07.28 18/06/96 -0700, you wrote:
Are they numbered from sunrise, with sunrise=0, one hour later as 1
two hours since sunrise as 2 etc?
The Babilonian hours start their count from the sunrise, and end it at the
next sunrise, so you can number the sunrise line (orizontal) with 0 or 24 as
you
Hi All,
I printed out a horizontal dial for my 87 year old father. I make
it with Zonwvlak (available from NASS). After reading the directions,
I found the software powerful yet easy to use. F.J. de Vries did an
excellent job in writng the software. I found that Ami Pro 3.0 will
import
Are they numbered from sunrise, with sunrise=0, one hour later as 1
two hours since sunrise as 2 etc?
Yes, correct.
Italian hours. I understand these to be the hours until sunset.
No, in their original use they are counted since sunset.
I would take these to also be 1/24 of a day in
Warren Thom wrote:
Hi All,
I printed out a horizontal dial for my 87 year old father. I make
it with Zonwvlak (available from NASS). After reading the directions,
I found the software powerful yet easy to use. F.J. de Vries did an
excellent job in writng the software. I found that
Warren Thom wrote:
Can we draw a sundial from these equations? How are a and b related to
latitude, declination of the sun, and hour angle?
The classic equations of the various conic sections are not directly
used in the process
of calculating the declination and hour lines of a
Warren,
I wrote a fairly detailed analysis of Bifilar Dials in 1978, complete with day
curves, etc. - most recently it was reprinted in the Bulletin of the British
Sundial Society (95.1:18-27) for Feb 1995.
A conic section treatment of the day curve for a traditional dial can be found
as Problem
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