- (Paris, France: L'Académie des Sciences, 1869.
- unbound, edges uncut, in later portfolio
- 6 pages
Price: $350.00 other currencies
Order Nr. 133625
Text in French. From the private library of Dr. Elliott and Eileen Hinkes. Extracted from Comptes rendus des séances de L'Académie des Sciences, LXIX, December 13, 1869. The siderostat is a revolving flat mirror designed to enhance telescopic viewing. Foxing. Unopened.