Roger Bailey wrote: > The UV indicator dial looked much like the Martian dial of Bill Nye and > Woody Sullivan. The circular lines did not just show the altitude of the > sun or rate the hazard as a simple cosine function. The thickness of the > ozone layer penetrated by UV rays at different angles was also considered. > Now I wish I had kept the article and built the dial.
The article in question (with an accompanying photo) is called "The Ultraviolet Sundial," _Sky and Telescope_, July, 1994, page 94. The author, John Adair, even went so far as to apply for a U.S. patent on the gadget. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California
