Edley, Please send Karen's article.
Me as well, please!
Thank you
Alfio Pelli
-
Me too, please!
Thanks,
Richard
Edley, Please send Karen's article.
Thanks,
Charlie
Subject: Re: Anti-sundial
Date: Tue, 17 Sep 2002 17:02:50 -0700
From: Edley McKnight [EMAIL PROTECTED]
Reply-To:
Edley, Please send me Karen's article.
Thank you
Jose l. Diaz
-
Please also send me Karen's article -- thanks!
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Tuesday, September 17, 2002 9:56 PM
To: sundial@rrz.uni-koeln.de
Subject: Re: Anti-sundial
Edley, Please send Karen's article.
Thanks,
Charlie
-
We all know that True North (Polaris) is not the same as Magnetic North
when orienting a sundial. My grandfather's Boy Scout pocket Sunwatch is a
true gem for our family -- loaded with information for any enthusiastic
sundial traveler (complete with a compass, dial, and table of corrections
for
compute this variance for True North?
The anomaly is truly anomalous: it varies with coordinates relative
to the Magnetic Pole, but also with local geodetic anomalies, such as
large concentrations of iron; and over time as the M.P. floats
around. I doubt there is a formula, although
Hello Judith:
The Earth's magnetic field is in a constant state of change so there is no
simple answer to your question.
Every 5 years or so the World Magnetic Model is updated. This model will tell
you what the magnetic field is for a given location and date anywhere on the
Earth's surface
Judith,
Go to everyone's favorite search engine, Google.com, and enter
magnetic declination (or magnetic variation) and you'll find more
information, both text and graphic, than you can possibly browse
through before the end of this decade!
Cheers,
Mac Oglesby
We all know that True
Romano, Judith wrote:
We all know that True North (Polaris) is not the same as Magnetic North
when orienting a sundial. My grandfather's Boy Scout pocket Sunwatch is a
true gem for our family -- loaded with information for any enthusiastic
sundial traveler (complete with a compass, dial,
Today I finally got the oppurtunity to check the 2 Amsterdam sundials on
the New Church in the centre of the city.
The churchwall is roughly declining 12° to the east. The big round sundial
is mounted flat to the wall. So the style of the big dial is pointing to
the left (seen from below) of
but the arcane bit of knowledge I had never heard before was that
the man
(name forgotten) who studied and then defined the line from which all
North
American sundials are calibrated (if that is the word) had established
that
geographic point in this city of Indianapolis.
I have never
Subject: Repeat posting
Sent:17/9/02 1:21 PM
To: Sundial Mail List, sundial@rrz.uni-koeln.de
Fellow Shadow watchers,
Apologies if you've seen this more than once - if at all
- but for some reason I didn't receive a circulated version via the SML so
Hello Thibaud
As the one who started this thread on the Amsterdam Sundial, I assume this is
the Church next to the Royal Palace.
My original question was why the large round sundial at the top of the wall was
showing a time several hours different from clock time, ..
in July 2002
Hi Tony and all,
In an book I read from the library regarding the establishment of standard
longitude
measurements it was mentioned that at one time there were a great number of
contenders for zero meridian within the North American continent. I had heard
of
both Boston and Philadelphia at
The October 2002 issue of Poptronics on pages 53 through 56 has an article
Sundials --- or the shadow tells all.
It's about using photo transistors and LEDs to remotely indicate the time.
Brooke Clarke
-
Excellent detective work Thibaud! And good pictures too. I was sure
something was amiss with one of those two southerly dials. I was unable to
find the other two east and west dials on the church wall. I don't think I
looked at the stone corbels. They must be very small and high up.
John
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