The Popular Science Monthly 



Entered in the Post Office in Lancaster, Pa., as second-class matter. 



CONTENTS OF AUGUST NUMBER 



The History of the Conservation of Energy ; the Age 

 of the Earth and the Sun. Professor Florian 

 Cajoki. 



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. 



CONTENTS OF SEPTEMBER NUMBER 



The Botanical Gardens of Ceylon. Professor 

 Francis Ramaley. 



The Prehistoric Aborigines of Minnesota and their 

 Migrations. N. H. Winchell. 



The Movement toward "Physiological " Psychology. 

 Professor R. M. Wenley. 



The Practical Value of Pure Science. Professor 

 Thos. Montgomery, Jr. 



The Physique of Scholars, Athletes and the Average 

 Student. Professor D. A. Sargent. 



Modern and Early Work upon the Question of Root 

 Excretions. Howard S. Rehd. 



Silver. Thos. F. Van Wagenen. 



Japanese Handwriting. Dr. E. W. Scripture. 



The Progress of Science : 



The Life and Letters of Herbert Spencer ; The 

 Financial Status of the Professor in the United 

 States and in Germany ; Scientific Items. 



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