Daniel Roth answered this query: >> My interest: a digital sundial. Is such a thing possible with Moire >> gratings?
>Yes! [EMAIL PROTECTED] has developed such a kind of >sundial. I'd like to add that Robert Kellog of Rockville, Maryland has also designed (independently to my knowledge) a similar sundial, and showed versions of it to those attending the North American Sundial Society's last two meetings. An early description appeared in the NASS journal, The Compendium, 2 (1995): 4-10. He began to offer it for sale in the Dec. 1996 issue. For more information on his design, which he has patented, I suggest people contact him at: [EMAIL PROTECTED] Sara Schechner Genuth NASS Secretary Sara Schechner Genuth, Ph.D. Gnomon Research Tel/Fax: (301) 593-2626 Customized Curatorial Services Internet: [EMAIL PROTECTED] 1142 Loxford Terrace Silver Spring, MD 20901 Center for History of Physics Tel: (301) 209-3166 American Institute of Physics Fax: (301) 209-0882 One Physics Ellipse Internet: [EMAIL PROTECTED] College Park, MD 20740 National Museum of American History Tel: (202) 357-2216 Room 1040, MRC 605 Fax: (202) 786-2851 Smithsonian Institution Internet: [EMAIL PROTECTED] Washington, D.C. 20560
