Vol. LXXXIV, No. 5 MAY, 1914 



THE 



POPULAR SCIENCE 



MONTHLY M^i 





EDITED BY J. McKEEN CATTELL ^ l 



CONTENTS 



The Measurement of Environic Factors and their Biologic Effects. Dr. 



D. T. MacDotjgal 417 



The Theory of Relativity and the New Mechanics. Professor William 

 Marshall 434 



The Small College and Its President. One of Its Professors . . 449 



Labor and Capital. Professor John J. Stevenson .... 459 



The Struggle for Equality in the United States. Professor Charles F. 



Emeriok 471 



Science in Newspapers. Dr. J. A. Udden . . . ... . 483 



The Science of History. Professor Clarence Walworth Alvord . 490 



The Practical Necessity of School Clinics. Dr. E. H. Lewinski-Corwin 500 



The Laboratory of Comparative Pathology of the Zoological Society of 



Philadelphia. Dr. R. W. Shtjfeldt 507 



The Progress of Science : 



The American Museum of Natural History ; The Marvels of Science ; Quarantine 



of Hawaiian Fruit ; Scientific Items ........ 514 



THE SCIENCE PRESS 



LANCASTER, PA. GARRISON, N. T. 



NEW YOEK : Sub-Station 84 

 Single Number, 30 Cents Yearly SuBSCRipnoN, |3.00 



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Copyright, 1913. by THE SCIENCE PRESS 



