H I L LINOI S UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN PRODUCTION NOTE University of Illinois at Urbana-Champaign Library Brittle Books Project, 2012. COPYRIGHT NOTIFICATION In Public Domain. Published prior to 1923. This digital copy was made from the printed version held by the University of Illinois at Urbana-Champaign. It was made in compliance with copyright law. Prepared for the Brittle Books Project, Main Library, University of Illinois at Urbana-Champaign by Northern Micrographics Brookhaven Bindery La Crosse, Wisconsin 2012 (OI 00.)' I~I - I I ullr II~ b 1 I I - II I TH-E UNIVERSITY OF ILLINOIS LIBRARY A'2.'r' ' 9~1 r II Cp ~- IC I C~--L - ~- ~-p- *--rs I II -~- I L~ @ Comparison of te dbob3ea& opiode Aeabing a of eaiyfus nb A THESIS FOR THE octorate in 10bi1osopbp -BY- W. WRIGHT FISHER APPROVED BY THE FACULTY OF THE GRADUATE OF THE ALNEW YORK UNIVERSITY, 1900oo NEW YORK 1900 SCHOOL