The Popular Science Monthly 



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



CONTENT8 OF THE JULY NUMBER 



Pasteur, a Study in Greatness. Professor Fbrnando 

 Wood Martin. 



Concealing Coloration. Abbott H. Thaykr. 



Expansion of the Usefulness of Natural History 

 Museums. Professor Thomas H. Montgomery, Jr. 



The History and Varieties of Human Speech. Dr. 

 Edward Sapir. 



University Standards and 8tudent Activities. Orris 

 Leslie Elliott. 



The Psychology of Mental Deficiency. Dr. Bird T. 

 Baldwin. 



Jacobus Henricus van 't Hoff. Professor Harry C. 

 Jones. 



The Progress of Science: The Amherst Idea; The 

 Catskill Aqueduct ; Scientific Items. 



CONTENTS OF THE AUGUST NUMBER 



The Significance of Tropisms for Psychology. Dr. 

 Jacques Loeb. 



Feeling in the Interpretation of Nature. Professor 

 William E. Ritter. 



The Typhoid Fly on the Minnesota Iron Range. Pro- 

 fessor F. L. Washburn. 



What Makes a College ? Professor A. B. Wolfe. 



The University in Politics. Professor T. D. A. Cock- 

 erell. 



The Classification of the Sciences. Dr. Ira Woods 

 Howerth. 



Francis Galton. Dr. J. Arthur Harris. 



The Origin of Luminous Meteor Trains. Dr. C. C. 

 Trowbridge. 



The Progress of Science : 



The Extension of the American Museum of 

 Natural History ; The Protection of the Fur Seal; 

 Scientific Items. 



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