Frank Evans wrote:
Original Message
Subject: Re: Polar sundials
Date: Sat, 19 Jun 2010 14:15:53 +0100
From: Frank Evans frankev...@zooplankton.co.uk
To: kool...@dickkoolish.com
Greetings, fellow dialists,
More universally, imagine a point
Tom Laidlaw wrote:
Hi there,
I'm trying to resolve what seems like a conflict of information. Some
resources say that a vertical dial is simply a horizontal dial rotated 180
degrees. But when I used Hristov's spreadsheets the calculated angles are
different. Which is correct? Or what am I
Try this experiment:
Draw a circle that represents the earth and
draw a vertical line through it for the
polar axis.
At 45 N latitude, draw the profile of a vertical
dial. At 45 S, draw the profile of a horizontal
dial. You will see that they are in the exact
same orientation with respect to
Original Message
Subject:Re: Polar sundials
Date: Sat, 19 Jun 2010 14:15:53 +0100
From: Frank Evans frankev...@zooplankton.co.uk
To: kool...@dickkoolish.com
Greetings, fellow dialists,
More universally, imagine a point on the earth's surface ninety degrees
, it is from Illustrating Time's Shadow on my web
site.
Simon Wheaton-Smith
www.illustratingshadows.com
Silver City, New Mexico W108.2 N32.75 and
Phoenix, Arizona, W112.1 N33.5
--- On Fri, 6/18/10, Tom Laidlaw tomlaid...@comcast.net wrote:
From: Tom Laidlaw tomlaid...@comcast.net
Subject: Polar
Hi there,
I'm trying to resolve what seems like a conflict of information. Some
resources say that a vertical dial is simply a horizontal dial rotated 180
degrees. But when I used Hristov's spreadsheets the calculated angles are
different. Which is correct? Or what am I missing? Also I thought I
screen when you read this!
Regards
Andrew Pettit
-Original Message-
From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of Tom Laidlaw
Sent: 19 June 2010 06:13
To: 'sundial list'
Subject: Polar sundials
Hi there,
I'm trying to resolve what seems like
