SCIENCE— ADVERTISEMENTS 



If 



you have doubts about "the type course" for beginners in 

 college zoology — 



you are teaching a broader course, presenting principles — 



you agree that unity and representativeness are essentials in 

 a first course in college zoology — 



you will be interested in 



SHULL'S 



Principles of Animal Biology 



McGraw-Hill Agricultural and Biological Publications 



By A. FRANKLIN SHULL 



Associate Professor of Zoology, University of Michigan 

 with the collaboration of 



GEORGE R. LA RUE 



Assistant Professor of Zoology 



and 



ALEXANDER G. RUTHVEN 



Professor of Zoology and Director of Museum of Zoology, University of Michigan 



441 pages, 6x9, illustrated, $3.50. Laboratory Manual to accompany 

 the text, $1.00 



This is the first expression in textbook form of the newer methods of teaching 

 zoology. It embodies the material and methods that have been developed in the course 

 in zoology at the University of Michigan. 



The book aims to present a body of principles that may be brought under such 

 topics as morphology, physiology, ecology, taxonomy, geographical distribution, 

 paleontology and evolution. It is felt that such a course has the advantages of unity and 

 representativeness — that only such a course makes possible an arrangement of subject 

 matter so that each topic leads to another and rests upon those that precede. 



See this new book. Send for a copy on approval 



McGRAW-HILL BOOK CO., Inc. 



239 West 39th Street, New York 



