Great Inventions and Discoveries, by Willis Duff Piercy 37574 [Link: http://www.gutenberg.org/3/7/5/7/37574 ] [Files: 37574.txt; 37574-8.txt; 37574-h.htm; ] [Clearance: 20110525164611piercy] E-text prepared by Albert L�szl� and the Online Distributed Proofreading Team (http://www.pgdp.net) from page images generously made available by Internet Archive (http://www.archive.org/) Thanks, Joe Loewenstein