The Boy's Playbook of Science, by John Henry Pepper 41839 [Link: http://www.gutenberg.org/4/1/8/3/41839 ] [Files: 41839.txt; 41839-8.txt; 41839-h.htm] Thanks to Neville Allen, 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