HEREDITY IN RELATION TO EUGENICS 



By CHARLES B. DAVENPORT, Director, Department of Experi- 

 mental Evolution, Carnegie Institution of Washington. With 

 diagrams. 8vo. $2.00 net. 



Eugenics treats of inborn, inheritable capacities and tenden- 

 cies. Modern heredity explains how these tendencies get 

 into the children and assists young persons to select consorts 

 so as to have a sound offspring. The book tells what is 

 known of the inheritance of various diseases and other char- 

 acteristics; it discusses the origin of feeblemindedness, its 

 vast social consequences, and its elimination ; it considers 

 American families, the part they have played in history, and 

 the proof they furnish of the all-importance of " blood." 



"One of the foremost authorities . . . tells . . . just what scientific 

 investigation has established and how far it is possible to control what 

 the ancients accepted as inevitable. . . . The scientific student of hered- 

 ity will find in it the latest developments and achievements in his partic- 

 ular province. . . . Nevertheless, it is meant more for the intelligent 

 general reader, who will be able to read it ... with entire compre- 

 hension. . . . Many interesting instances that illustrate how good or 

 bad tendencies, physical, mental, or moral, radiate from the focal point 

 of a single individual or family." N. Y. Times Review. 



THE EVOLUTION OF ANIMAL INTELLIGENCE 



By S. J. HOLMES, Professor in the University of Wisconsin. 



With illustrations and charts. 8vo. $2.75 net. 



A general account of the evolution of animal behavior from 

 the mollusk and crustacean up to apes and monkeys. The 

 critical point of the transition from instinct to intelligence re- 

 ceives special treatment. One of America's leading scientific 

 authors who saw the manuscript before publication writes, 

 " Holmes's is the best of the lot, and on the whole the most 

 interesting because it gives the most facts; i.e., examples, 

 illustrations, incidents, stories, etc. Holmes is immensely well 

 informed." 



PFUNGST'S CLEVER HANS 



By OSKAR PFUNGST. Translated by CARL L. RAHN, Fellow in 

 Psychology in the University of Chicago. I2mo. $1.50. 

 The performances of Clever Hans, the horse of Mr. von 

 Osten, created throughout Germany intense excitement and a 

 widespread, overheated discussion of animal reason. 



"The book is a minute and careful examination of the facts in the 

 case, and should be of interest to psychologists and to all students of 

 the intelligence of the lower animals"." Spring-field Republican. 



HENRY HOLT AND COMPANY 



PUBLISHERS NEW YORK 



