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On Sun, 10 Aug 2003 19:41:20 -0700, Brooke Clarke wrote:
>It's about 15 feel long and a few feet wide as far as I can remember.
>Where the hole is at the base of the skylight might be above the floor
>by 12 -15 feet.
>In the winter when the slant distance is long the image is dim so the
>white 3x5 card makes it visible.
>I tried a number of different hole sizes. It's like a f-100 lens and
>you get an image of the sun on the floor. As the hole gets larger the
>image gets brighter and fuzzier.
>
Thank you, good information. I do have an old book that I still like
"Sundials -- Their Theory and Construction" by Albert E. Waugh; but I
am glad to get more accurate and newer ideas.
--
Richard ...
