xii BRAINS OF RATS AND MEN 



University, the University of Cincinnati, the Uni- 

 versity of Chicago, later president of the University 

 of New Mexico, his encyclopedic knowledge, intellec- 

 tual honesty, and personal magnetism have left their 

 impress upon American science for all time. His un- 

 timely death in 1904 at the age of forty-six left all 

 of his enterprises incomplete, but the influence of his 

 personality still lives. 



Shortly before an acute attack of pulmonary 

 tuberculosis in 1894 (from which he never recovered) 

 my brother laid out a comprehensive program of 

 research in comparative neurology, planning to devote 

 himself to the study of animal behavior in its genetic 

 aspects, in the hope that I would carry on parallel 

 morphological studies upon the nervous systems of the 

 animals under investigation. His part of this program 

 has since been ably prosecuted by others. My own 

 anatomical work has been guided throughout by the 

 motives implanted by my brother's insight and tute- 

 lage, to which in no small measure the conclusions 

 presented in this volume owe their parentage. 



C. JuDSON Herrick 

 Chicago, III. 

 December 21, 1925 



