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." TV. 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." Springfield Republican. 



HENRY HOLT AND COMPANY 



PUBLISHERS NEW YORK 



