> Thank you for posting the pictures and information on the Genk Sundial
> park in Belgium. I would like to mention that the park is more than just
> 12 dials. Each of the 12 designs takes a design "one step further". For
> example, the "Analemmatische zonnewijzer" uses the same gnomon ( a person
> standing on the month mark) for two analemmic dials - one of which is
> circular like G.E.Taylor's famous circular sundial.
>
> I do have a question about the #7. "Bifilaire zonnewijzer". One picture
> shows a curved chain and another shows a straight wire between two posts.
> In either case, I did not understand how it was "bifilar" in nature.
You could not. The chain is easily vandalized, and has been
several times. My page shows several "repairs", which were not
always correct.
The top picture shows the position of the chain at the official
opening, last March. The chain touches the pole style, and thus
there are no crossing lines, as you noted correctly.
The correct position can be seen on the picture with the folks
gathering around the designer (Mr. Soler, at left, carrying the book):
the chain runs clearly BELOW the pole style. The next picture
(with the measuring tape) shows that it had regained its correct
height last July: the minimum is 70 mm above the dial plate.
As a consequence of this arrangement, the date line for the
equinox is not straight, but slightly curved.
Perhaps I'd better made the English version right away! Stimulated
by questions like yours, I have already expanded the English
summary slightly.
Regards, Frans
------------------------------------------------------------
Dr. Frans W. Maes
Dept. of Animal Physiology
University of Groningen
P.O. Box 14 Tel. : +31-50-3632357
9750 AA Haren Fax : +31-50-3635205
The Netherlands E-mail: [EMAIL PROTECTED]
Visit my homepage at: http://www.biol.rug.nl/maes/
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