PREFACE 



Mr. Frederick S. Beckman remain a valuable asset of the book. The entire 

 manuscript was read critically by Dr. L. N. Garlough, Dr. Peter Gray, 

 and Dr. Theodora N. Salmon, while the chapter on Man and the Primates 

 was read by Dr. William L. Straus, Jr. Their criticisms have resulted 

 in significant improvements. I am also indebted to Dr. Alfred S. Romer 

 and Dr. Warren P. Spencer, whose criticisms of the first edition were still 

 in many respects helpful in the revision. I am also indebted to those many 

 users of the first edition who have submitted suojoiestions and corrections, 

 many of them most helpful. Finally, I am indebted to the many publishers 

 who have generously granted permission to use quotations and figures 

 from their books. Each of these is separately acknowledged at the appro- 

 priate place. 



This book is based upon a course of lectures which was first presented 

 in 1947 at the Dominican College of San Rafael, California, was then 

 developed over a period of years at the University of Notre Dame, and 

 which is currently being given at the University of Ottawa. 



Edward O. Dodson 

 April, 1960 

 Ottawa, Ontario 



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