I recently did an experiment with time-lapse photography
of a gnomon's shadow throughout a full day using an ordinary Web Cam and some
software I use on my weather site.
Some of you will recognize the gnomon as the one used on
my Hot Tub Dial. I do not present this as a work of art, or even a sundial
(there are no numerals). The images have occasional glare problems, and my
backyard has suffered from less than an inch of rain since the first of the
year.
I do think this sort of presentation would be an
interesting and perhaps useful way to demonstrate a particular dial, especially
a complicated one. The result can be put on the internet or kept offline on a
computer near the dial. If anybody is interested in making a similar loop, I can
coach you on acquiring the images and provide the _javascript_ that runs
them.
The silver sphere is just for fun.
Bob
