his work as a writer of successful textbooks, 

 made a first-hand investigation of biological 

 work and teaching in the leading universities of 

 the United States and thirteen foreign lands, 

 thus gaining an educational and cultural back- 

 ground that few American scientists possess. 



He is both a trained biologist and a trained 

 psychologist, thus understanding not only the 

 problems to be presented but the presentation 

 as well. 



He has taken all laboratory courses offered in 

 the regular medical course of American schools 

 of medicine, thus understanding, particularly, the 

 needs and problems of the medical and dental 

 student. 



He has worked out a consistent terminology 

 in General Biology and Physiology not only in 

 the High-School Course, but in General Biology, 

 Embryology, and Comparative Anatomy for the 

 College Course as well. An example of the com- 

 prehensiveness of the text can be suggested by 

 noting that although medical writers use some 

 ten different names for the "chondriosome," alone, 

 for instance, the student need but to refer to the 

 index under any one of these to learn immedi- 

 ately that ail pertain to the selfsame factor. 



He is the only American biologist who has 

 written three accepted texts (though bound in 

 two volumes) in three sciences — General Biology, 

 Embryology, and Comparative Anatomy. 



The Standard of Comparison 

 If the VALUE of a college textbook is deter- 

 mined by those most capable of passing judgment 

 thereon — the heads of departments in charge of 

 the particular subject — in our colleges and uni- 

 versities : 



If the JUDGMENT of such men is expressed 



