I have never seen this form associated with Russell Porter, but will check further. However, I think we need more information to tell the conventional type. For example, is the long rod the gnomon, and is it to scale with the arc? What do the hour lines look like? Does the sundial include both wooden objects set up as a pair, or just a single one?
Sara Sara J. Schechner, Ph.D. David P. Wheatland Curator of the Collection of Historical Scientific Instruments Department of the History of Science, Harvard University Science Center 251c, 1 Oxford Street, Cambridge, MA 02138 Tel: 617-496-9542 | Fax: 617-496-5932 | sche...@fas.harvard.edu http://www.fas.harvard.edu/~hsdept/chsi.html -----Original Message----- From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Sent: Thursday, May 20, 2010 2:45 PM To: sundial@uni-koeln.de Subject: Russell Porter Sundial? Friends, Is there a conventional name (like horizontal', equatorial', polar' and so on) for the sundial constructed as shown below? Am I right thinking that the name of this construction is "Russell sundial"? I mean Prof. Russell Porter, the Palomar Mountain Observatory. Any help, please. Aleks www.sundials.ru --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
