SCIENCE 



Friday, August 29, 1913 



CONTENTS 

 A Mechanistic View of Psychology: Dr. 

 George W. Ceile 283 



The Chestrmt-ilight Parasite {Endothia para- 

 sitica) from China: Dr. C. L. Shear, Neil 

 E. Stevens 295 



The Biscovory of the Chestnut Baric Disease 

 in China: Dr. David Faikchild 297 



Scientific Notes and News 299 



University and Educational News 301 



Discussion and Correspondence: — 



Color Correlation in Cowpeas: Dr. W. J. 

 Spillman. Variations in the Earth's Mag- 

 netic Field: Professor Francis E. Nipher. 

 Excusing Class Absences in College: Dr. E. 

 A. Miller 302 



Scientific Books: — 

 Py craft's The Infancy of Animals: Pro- 

 fessor Francis H. Herrick. Brunswig on 

 Explosives: Dr. A. P. St 301 



Notes on Meteorology and Climatology : — 

 The Solar Constant of Radiation; West 

 India Hurricanes; Humidity and Frost 

 Damage; Australian Meteorology; Notes: 

 Charles F. Brooks 309 



Special Articles: — 



The Rediscovery of Peridermium pyriforme 

 Pech: Professor J. C. Arthur, Dr. Frank 

 D. Keen. A Wine-red Sunflower: Pro- 

 fessor T. D. A. COCKERELL 311 



Societies and Academies: — 



The Biological Society of Washington: M. 

 W. Lyon, Jr 313 



MSS. intended for publication and books, etc., intended for 

 roTiew should be sent to Professor J. McKeen Cattell, Garrison- 

 on-Hudson, N. Y. 



A MECHANISTIC VIEW OF PSYCHOLOGY "■ 

 Traditional religion, traditional medi- 

 cine and traditional psychology have in- 

 sisted upon the existence in man of a tri- 

 une nature. Three "ologies" have been 

 developed for the study of each nature as 

 a separate entity — body, soul and spirit; 

 physiology, psychology, theology; physi- 

 cian, psychologist, priest. To the great 

 minds of each class, from the days of Aris- 

 totle and Hippocrates on, there have come 

 glimmerings of the truth that the phenom- 

 ena studied under these divisions were in- 

 terrelated. Always, however, the conflict 

 between the votaries of these sciences has 

 been sharp, and the boundary lines be- 

 tween them have been constantly changing. 

 Since the great discoveries of Darwin, the 

 zoologist, biologist and physiologist have 

 joined hands, but still the soul-body-spirit 

 chaos has remained. The physician has 

 endeavored to fight the gross maladies 

 which have been the result of disordered 

 conduct ; the psychologist has reasoned and 

 experimented to find the laws governing 

 conduct ; and the priest has endeavored by 

 appeals to an unknown god to reform 

 conduct. 



The great impulse to a deeper and 

 keener study of man's relation, not only to 

 man, but to the whole animal creation, 

 which was given by Darwin, has opened 

 the way to the study of man on a differ- 

 ent basis. Psychologists, physicians and 

 priests are now joining hands as never 

 before in the great world-wide movement 

 for the betterment of man. The new sci- 



' Paper read before Sigma Xi, Case School of 

 Science, Cleveland, Ohio, May 27, 1913. 



