The Animal Behavior Series 



UNDER THE GENERAL EDITORSHIP OF 



ROBERT M. YERKES, Ph.D. 



Assistant Professor of Comparative Psychology, Harvard University 



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 + 290 pages, illus., $ 135 



" 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 pre- 

 liminary study, but it will be read with much interest by all students of com- 

 parative psychology." Journal of American Medical Association. 



The Animal Mind 



By MARGARET FLOY WASHBURN, PhJ>. 



Professor of Psychology, Vassar College 



New edition, cloth, izmo, about 375 pages 



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

 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 it is also for the most part inaccessible to the ordinary student, be- 

 ing widely scattered and to a considerable extent published in the journals of 

 specialists, which the average college library does not contain. Hence the 

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



The Series is published by 



THE MACMILLAN COMPANY 



Publishers 64-66 Fifth Avenue New York 



