Vol. LXXXIV, No. 6 



JUNE, 1914 



THE 



POPULAR SCIENCE 

 MONTHLY 0%k 



EDITED BY J. McKEEN CATTELL 



CONTENTS 



Facts and Factors of Development. Professor Edwin Grant Conklin 521 



The Struggle for Equality in the United States. Professor Charles F. 



Emerick 538 



The Future of the Chestnut Tree in North America. Professor Arthur 



H. GRAVE8 551 



Claude Bernard. D. Wright Wilson 567 



The General Physico-chemical Conditions of Stimulation in Living Or- 

 ganisms. Professor Ralph S. Lillie ...... 579 



The Psychology of Relaxation. Professor G. T. W. Patrick . . 590 



The Need for a Salaried Medical Profession. Professor Paul L. Vogt . 605 

 Is the Montessori Method a Fad ? Professor Frank Pierrepont Graves 609 



The Progress of Science : 



Kutherford on the Constitution of Matter ; The Structure of the Atom ; The Small 

 College and its President ; Scientific Items . . . . . 615 



Index to Volume LXXXIV 621 



THE SCIENCE PRESS 



LANCASTER, PA. GARRISON, N. Y. 



NEW YORK : Sub-Station 84 

 Single Numbeb, 30 Cents Yearly Subscription, $3.00 



Copyright, 1913. by THE SCIENCE PRESS 



