[41 ] 



and foremost a biologist, and his natural his- 

 tory studies influenced profoundly his soci- 

 ology, his psychology, and his philosophy 

 in general. The beginner may be sent now 

 to Professor D'Arcy Wentworth Thomp- 

 son's Herbert Spencer Lecture, 1913, and he 

 must be indeed a dull and muddy-mettled 

 rascal whose imagination is not fired by 

 the enthusiastic — yet true — picture of the 

 founder of modern biology, whose language 

 is our language, whose methods and prob- 

 lems are our own , the man who knew a thou- 

 sand varied forms of life, — of plant, of 

 bird, and animal, — their outward struc- 

 ture, their metamorphosis, their early de- 

 velopment ; who studied the problems of 

 heredity, of sex, of nutrition, of growth, of 

 adaptation, and of the struggle for exist- 

 ence. 1 And the senior student, if capable 

 of appreciating a biological discovery, I ad- 

 vise to study the account by Johannes 



1 Summarized from D'Arcy Wentworth Thompson. 



