Sound, by John Tyndall 54969 [Link: http://www.gutenberg.org/5/4/9/6/54969 ] [Files: ; 54969-0.txt; 54969-h.htm] Thanks to Peter Vachuska, Chuck Greif, Turgut Dincer 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