The triangle on the horizontal sundial is parallel to the earth axis. The horizontal face is flat on the ground (or pedistal) and not in line with the axis
A horiz dial will work on any lattitude in the same hemisphere (otherwise the numbers are backwards) as long as the triangle gnomen is inline with the earth axis. This means that the dial face must sit on a wedge to make this happen. Donald On 7/28/11, Richard B. Langley <[email protected]> wrote: > 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 >> >> > > > > ----------------------------------------------------------------------------- > | 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/ > | > ----------------------------------------------------------------------------- > > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
