I bought such a sundial at a garden shop in Holland many years ago.
When I got it home, I realized that it was designed for the southern
hemisphere. Why it was being sold in Holland is a mystery. Probably
for the same reason that a stationery store in Fredericton sold an
"atomic clock" that could only receive the time signals from the
German longwave station, well out of range of Canada!
But the sundial is still usable if one installs the equatorial band
upside down and stands on one's head to read it. ;-)
-- Richard Langley
Quoting Chris Lusby Taylor <[email protected]>:
An armillary sphere can be used in either hemisphere. The only issue
is that the hour numbers, if written with their base lines along the
equatorial ring, will be upside down, but you could provide numbers
facing both ways, one set either side of the centre of the hour
band. Or, you could turn the numerals 90 degrees or even, as I did
for an equatorial dial I made for Singapore, use non-numeric pips,
as on playing cards, that can be read either way up.
Chris
----- Original Message -----
From: David Bell
To: [email protected]
Cc: <[email protected]>
Sent: Thursday, July 28, 2011 12:33 AM
Subject: Re: Longitudinal shift, another way
Create a uniquely crafted armillary sphere for your friend! It
could pack in a table lamp sized box for those many moves. It can be
truly universal and can be installed and adjusted for any location.
The only tricky part would be if they were to be stationed on the
southern hemisphere. You'd need to include two hour rings...
Dave
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| Richard B. Langley E-mail: [email protected] |
| Geodetic Research Laboratory Web: http://www.unb.ca/GGE/ |
| Dept. of Geodesy and Geomatics Engineering Phone: +1 506 453-5142 |
| University of New Brunswick Fax: +1 506 453-4943 |
| Fredericton, N.B., Canada E3B 5A3 |
| Fredericton? Where's that? See: http://www.fredericton.ca/ |
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