Inventing for Boys, by A. Frederick Collins 49064 [Link: http://www.gutenberg.org/4/9/0/6/49064 ] [Files: 49064-0.txt; 49064-h.htm]
Thanks to Chris Curnow, Elisa and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) David
