The Popular Science Monthly 



Entered in the Post Office m Lancaster, Fa., at second-class matter. 



CONTENTS OF JULY NUMBER 



Soil Wastage. Professor Thomas Chrowder 

 Chamberlin. 



The Mississippi River Problem. Dr. Walter Shel- 

 don Tower. 



The High School Course. President David Starr 

 Jordan. 



Count Rumford. John Candee Dean. 



Hypothesis of Radiant Matter. Dr. Morris Loeb. 



The New Philosophy called Pragmatism. Professor 

 H. Heath Bawden. 



The Movement towards "Physiological Psychology." 

 Professor R. M. Wenley. 



A Physiological Problem — Enzymes. Dr. Orville 

 Harry Brown. 



Needed— A System of Aquatic Farming. Professor 

 Herbert Osborn 



The Progress of Science : 



Administrative Methods in American Univer- 

 sities ; The Boyden Department of the Harvard 

 College Observatory ; The Hanover Meeting of 

 the American Association ; Scientific Items. 



CONTENTS OF AUGUST NUMBER 



The History of the Conservation of Energy ; the Age 

 of the Earth and the Sun. Professor Florian 

 Cajori. 



Florissant ; a Miocene Pompeii. Professor T. D. A. 

 Cockerell. 



The Truth about Crimes and Violence in Chicago 

 and in Greater New York. Maynard Shipley- 



The Movement towards "Physiological Psychology." 

 Professor R. M. Wenley. 



The Nature, Origin and Function of Humor. Dr. 

 Linus W. Kline. 



A Bacteriological Study of Soiled Paper Money. 

 Warren W. Hilditch. 



Facts concerning Milk. Dr. A. E. P. Rockwell. 



Shall Our Forest Wealth be destroyed? Thomas 

 Elmer Will. 



The Progress of Science. 



Dartmouth College and the Summer Meeting of 

 the American Association for the Advancement 

 of Science; International Congress and Perman- 

 ent International Bureaus ; Scientific Items. 



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