MADISON BENTLEY 473 



are three main subdivisions. In the first, discussion and experi- 

 mentation center in the problems of perception, especially the 

 necessity for a psychical factor in the integration of form. The 

 second part treats of action. Here appear current views regaid- 

 ing the relative importance to organic movements of stimulus, 

 receptor, centre, effector, impulse, telic ideas, will, and psychical 

 energy. The physiologist, e.g., holds to the efficacy of the simple 

 homogeneous stimulus. The Darwinist proposes his Psychoid, 

 the biologist his Gegenwelt, and the psychologist his "peripheral 

 subject." The title of the third part, Erfahrung, refers to the 

 author's theory of consciousness in the higher forms. Chapters 

 are devoted to habit, memory, dreams, play, intelligence, and 

 speech. The final synthesis is principally biological and philo- 

 sophical speculation. Those who have followed the recent de- 

 velopment of speculative biology in Germany will be entertained 

 by the discussion of theories and by Protessoi Schneider's own 

 constructions. 



The comparative psychologist's chief interest in the book lies 

 in the description and the discussion of the experiments. The 

 volume will be useful as a reference book in the laboratory (the 

 illustrations and the index are good), and it might serve — at 

 least in this country — as a point of departure for study in the 

 seminary. 



