Light Science for Leisure Hours, by Richard A. Proctor 54455 [Subtitle: A series of familiar essays on scientific subjects, natural phenomena, &c.] [Link: http://www.gutenberg.org/5/4/4/5/54455 ] [Files: ; 54455-0.txt; 54455-h.htm] Thanks to Chris Curnow, Les Galloway 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