The Popular Science Monthly 



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



CONTENTS OF THE FEBRUARY NUMBER 



The Physical Laboratory and its Contributions to 

 Civilization. Professor Arthur Gordon Webster 



The Origin and Evolution of the Nervous System. 

 Professor G. H. Parker. 



Current Progress in tb e Study of Natural Selection. 

 Dr. J. Arthur Harris. 



The Hibernation of Certain Animals. The Late 

 Walter L. Hahn. 



Some Abnormalities in Apple Variation. W. J. 

 Young. 



Science and Poetry. Dr. Charles W. Super. 



The Rural Opportunity and the Country School. 

 Joseph Weodbury Strout. 



Early Geological Work of Thomas Nuttall. Dr. 

 Charles Keyes. 



The Struggle for Equality in the United States. Dr. 

 Charles F. Emerick. 



The Progress of Science : 



The Atlanta Meeting of the American Associa- 

 tion for the Advancement of Science ; The Work 

 of the Council of the Association ; The Address 

 of the President ; Scientific Items. 



CONTENT8 OF THE MARCH NUMBER 



The Origin of the Flocking Habit of Migratory Birds. 

 Professor C. C. Trowbridge. 



Water. Dr. E. P. Wightman. 



Psychotherapy in Folk-medicine. Dr. Abram Lipsky. 



The Struggle for Equality in United States. Pro- 

 fessor Charles F. Emerick. 



The Question of Agricultural Population. Arland 

 D. Weeks. 



The Effects of School Life upon the Nutritive Pro- 

 cesses, Health and the Composition of the Blood. 



The Physical Beethoven. Dr. James Frederick 

 Bogers. 



The World versus Matter. Wm. E. Ritter. 



The Automobile and the Public Health. Dr. P. G. 

 Heinemann. 



Tropical Nature in Colombia. Professor A. 8. Pearse. 



The Progress of Science: 



Work in Engineering at Harvard University and 

 the Massachusetts Institute of Technology ; Track 

 Scale Testing Equipment of the Bureau of Stan- 

 dards; Scientific Items. 



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