The Animal Behavior Series 



Under the General Editorship of ROBERT M. YERKES, 

 Ph.D., Instructor in Comparative Philosophy, Harvard Uni- 

 versity 



The aim of the Series is to present a number of small volumes which 

 taken together shall form a comprehensive introduc- 

 tion to Comparative Psychology 



NOW READY 



The Dancing Mouse 



By ROBERT M. YERKES, Ph.D. 



Cloth, i2mo, xxi + 2go pages, illus., $1.25 net 



"Dr. Yerkes' book is a most interesting example of modern laboratory 

 methods and can be read with profit by any one, on account of the 

 accurate methods of observation and careful deductive reasoning 

 which it shows. An elaborate, painstaking system of experiments 

 was carried on with over 400 mice, with the object of determining 

 muscular coordination, structural peculiarities, strength of the special 

 sense organs, habit formation, educability, and strength of memory of 

 these little animals. Some experiments were also undertaken along 

 the line of inherited peculiarities. . . . The work is really only a 

 preliminary study, but it will be read with much interest by all 

 students of comparative psychology." Journal of American Medical 

 Association. 



The Animal Mind 



By MARGARET FLOY WASHBURN, Ph.D., Professor 



of Philosophy, Vassar College 



Cloth, i2mo, 333 pages, $1.60 net 



" As the author points out, the title of this book might more appro- 

 priately have been 'The Animal Mind Deduced from Experimental 

 Evidence,' for the facts here set forth are very largely the results of 

 the experimental method in comparative psychology. The mass of 

 experimental material that has been accumulated from the researches 

 of physiologists and psychologists is already great, but is also for the 

 most part inaccessible to the ordinary student, being widely scattered 

 and to a considerable extent published in the journals of specialists, 

 which the average college library does not contain. Hence the use- 

 fulness of the present . . . interesting work." New York Sun. 



The Series is Published by 



THE MACMILLAN COMPANY 



64-66 Fifth Avenue, New Tork 



