Vanderleib: Here is an url to some folks who make them. I bought one several years ago and they were most helpful.
http://www.shepherdswatch.ca/about.htm Steve I Yorktown VA USA At 03:43 PM 9/8/00 -0300, Vanderlei Borsari wrote: >I have a doubt and I hope someone can help me: I would like to make a >Shepherd´s (cilyndrical) dial, and I found the following equation to >calculate the size of the gnomon: >G = H cot(113,5º - lat) >Where: G is the size of the gnomon >H is the height of the dial scale >lat is the local latitude > >The problem is that I live in a city over the capricorn tropic (23,5º), and >it is not possible to calculate cot (113,5-23,5) = cot(90º). > >Thank you > >
