Claude Hartman wrote: > > I am searching for references to REFLECTION SUNDIALS that do more than > just project a spot on the wall or ceiling. > Daniel Roth has given me one example: The Gallery of the Astrolabe in > Rome. > I have copies of many related U.S. patents up through 1993. I have not > searched any foreign patents. > If anyone knows of others I might contact who might help I would greatly > appreciate it.
An important and historic refelection dial is found at the Lycee Stendhal at Grenoble, France. The dial is made in 1673. About other historic reflection dials is writen in Schriften der Freunde alter Uhren (Germany) Band XXIX 1990 Band XXXI 1992 These yearly books are printed by Deutschen Gesellschaft fuer Chronometrie. Both articles are of Rene R.J. Rohr. Fer J. de Vries
