John
carmichael wrote
<< I wish we could come
up with an easy fool-proof method that an
ignorant non-dialing customer could use to determine a wall's
declination>>
My suggestion
is:
Give these instructions to the
client.
1) Stick a piece of paper
to the outside of a vertical window on the wall whose declination you want to
know.
2) Hang a plumb bob about 1
foot away from the window, with the bob in a bucket of water (as a
damper).
3) Hold a small plain mirror
against the paper.
4) Note the date and time when
the string, the shadow of the string, and the
reflection of the string all coincide.
When you get the results, use
the "Dialists Companion" programme to get the sun's azimuth, and hence the
wall's declination.
1 minute is equivalent to about
0.25 of a degree.
Assumes you know the correct
latitude and longitude.
Mike Shaw
mailto:[EMAIL PROTECTED]
http://homepage.ntlworld.com/jmikeshaw/
N 53º 21'
24"
W 03º 01' 47"
Wirral, UK.
