Appletons' Popular Science Monthly, May, 1900, by Various 47219 [Subtitle: Vol. 57, May, 1900 to October, 1900] [Editor: J. McKeen Cattell] [Link: http://www.gutenberg.org/4/7/2/1/47219 ] [Files: 47219.txt; 47219-8.txt; 47219-0.txt; 47219-h.htm] Thanks to Greg Bergquist, Charlie Howard, 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