The Popular Science Monthly 



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



CONTENTS OF THE APRIL NUMBER 



The Influence of Forests upon Climate. Professor 

 Robert DeC. Ward. 



Professor Eoy Temple 

 Professor 



Goethe and the Chemists 

 House. 



The Domestication of American Grapes 

 U. P. Hedrick. 



United States Public Health Service. Dr. Alfred G. 

 Reed. 



The Increasing Mortality from Degenerative Mala- 

 dies. E. E. Rittenhouse. 



The Life Insurance Company as a Dynamic in the 

 Movement for Physical Welfare. Dr. Eugene 

 Lyman Fisk. 



Natural Selection. Professor T. D. A. Cockerell. 



Some Random Thoughts concerning College Condi- 

 tions. Professor John J. Stevenson. 



The Progress of Science : 



Research Institutions ; The Kallikak Family ; 

 Scientific Items, 



CONTENTS OF THE MAY NUMBER 



A Problem in Evolution. Professor William Patten. 



The North American Indians of the Plains. Dr. 

 Clark Wissler. 



Heredity and the Hall of Fame. Dr. Frederick 

 Adams Woods 



The Man who discovered the Circulation of the 

 Blood. Professor Fraser Harris. 



Great Erosional Work of Winds. Dr. Charles R. 

 Keyes. 



Hospitals, their Origin and Evolution. Dr. John 



Foote. 

 The New Optimism. Professor G. T. W. Patrick. 



Welfare and the New Economics. Professor Scott 

 Nearing. 



Scholarship and the State. Professor F. C. Brown. 



The Progress of Science: 



The Number of Scientific Men in the World; The 

 Scientific Career in the United States ; Scientific 

 Items. 



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