The Prolongation of Life, by Elie Metchnikoff 51521 [Subtitle: Optimistic Studies] [Editor: Peter Chalmers Mitchell] [Link: http://www.gutenberg.org/5/1/5/2/51521 ] [Files: ; 51521-0.txt; 51521-h.htm] Thanks to 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