Sara, That looks similar to a cylindrical equatorial dial done by Porter while at CalTech. The dial incorporated EoT correction and was, apparently, stolen (URL below).
http://pr.caltech.edu/periodicals/caltechnews/articles/v42/sundial.html Luke Coletti On 5/20/2010 12:34 PM, Schechner, Sara wrote: > 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 > --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
