devoted to "Embryology" ; Professors W. N. Steil of the University of 

 Wisconsin, J. G. Brown of the University of Arizona and the Carnegie 

 Desert Botanical Laboratory, and Sister Mary Ellen, of Santa Clara Col- 

 lege, for going over the portions on Botany; Professors Joseph Jastrow, 

 of the University of Wisconsin, and George A. Deglman, of Marquette 

 University, for reading the portions devoted to Psychology ; Professor 

 John B. Kremer, of Marquette University, for reading the portions 

 devoted to Geology and Paleontology; Professor Edward Miloslavich, 

 late of the University of Vienna, for reading those portions on Immunity 

 and Pathology ; Professor Alfred V. Boursy, for reading the glossary, 

 and Professor Robert Bauer, for reading the chapter on Coordination. 



Thanks are due Mr. Leo Massopust, Mr. Lane Newberry, and Mr. 

 Frank Leibly for the many and painstaking drawings they have made, 

 and to Mr. Arthur Vollert, Mr. Frank Krause, Mr. Gervase Flaherty, 

 Mr. Norman O'Neill, Mr. Frank Freiburger, Mr. Robert Schodron, Miss 

 Phyllis Schnader, Miss Irma Gall, and Miss Nathalie Hart for the many 

 hours of assistance rendered in seeing the book through the laborious 

 processes of printing. 



The author's appreciation must be extended to his fellow charter 

 members of the Baconian Society, Professors Walter Abel, Alfred V. 

 Boursy, John Giesen, and Edward Miloslavich, for assistance and criti- 

 cism rendered in discussing innumerable points at their meetings. 



And lastly, the author would be remiss in his duty did he not 

 express his special thanks and appreciation to his co-worker of many 

 years, Professor John Giesen, whose loyalty and willingness to assist 

 in every way have made many additional hours of work possible on 

 this book. 



EDWARD J. MENGE. 



Marquette University, 



Milwaukee, Wisconsin, 



June 25, 1922, 



