On the Construction of a Sivered Glass Telescope, by Henry Draper 53542 [Subtitle: Fifteen and a half inches in aperture and its use in celestial photography] [Link: http://www.gutenberg.org/5/3/5/4/53542 ] [Files: ; 53542-0.txt; 53542-h.htm] Thanks to Thiers Halliwell, Chris Curnow and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) Regards, Al