The Popular Science Monthly 



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



CONTENTS OF MAY NUMBER 



Some New View Points in Nutrition. Professor 

 Russell H. Chittenden. 



The Utilization of Auxiliary Entomophagous Insects 

 in the Struggle against Insects Injurious to Agri- 

 culture. Professor Paul Marchal. 



Of the Soil of the Earth. Spencer Trotter. 



The Conservation of the Great Marine Vertebrates:— 

 Imminent Destruction of the Wealth of the Seas 



DR.G.R. WlELAND. 



The Whiter Pittsburgh. John F. Cargill. 



The Education of the Colored Race is the Duty of the 

 Nation. Professor Harris Hancock. 



Should Psychology Supervise Testimony? Fabrian 

 Franklin. 



The Progress of Science : 



The Carnegie Foundation for the Advancement 

 of Teaching and the State Universities; The 

 Vegetation of the Saltan Sea ; John Samuel Bud- 

 gett ; Scientific Items. 



CONTENTS OF JUNE NUMBER 



The Movement toward " Physiological Psychology." 

 Professor R. M. Wenley. 



Coincident Activities of the Earth and the Sun. Dr. 

 Ellsworth Huntington. 



Springs as a Geographic Influence of Humid Climates. 

 Professor Frank Carney. 



Johannes Miiller. Dr. Philip B. Hadley. 



The Gensis of Ores in the Light of Modern Theory. 



Horace V. Winchell. 

 The Relation between Recent Industrial Progress and 



Educational Advance. Dr. Frank T. Carlton. 

 The Dawn of Quadrupeds in North America. Dr. 



Roy L. Moodie. 



The Progress of Science : 



The National Academy of Sciences and the 

 American Philosophical Society ; Dedication of 

 the New Buildings of the College of the City of 

 New York ; Lewis Henry Morgan ; The Sargent 

 Anniversary Medal ; Scientific Items. 



Index to Volume LXXII. 



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