The Popular Science Monthly 



Entered in the Pott Office «n Laneaeter, Pa., as tecond-clasg matter. 



CONTENTS OF OCTOBER NUMBER 



The Spoliation of the Fulls of Niagara. Dr. J. W. 

 Spencer. 



The Industries of Niagara Falls. 



The Classification of Mathematics 

 Miller. 



Academic Aspects of Administration. 

 Joseph Jastrow. 



Raymon d H. Arkot. 

 Profe ssor 6. A. 



Professor 



Professor George 



James 



Something new in "Freewill." 

 Stuart Fullerton 



The Specialist Blight on American Education. 

 P. Munroe. 



The Laws of Social Attraction. Professor Simon N- 

 Patten. 



The Passing of the Sturgeon : A Case of the Unparal- 

 leled Extermination of a Species. Dr. Walter 

 Sheldon Tower. 



Foreign Associates of National Societies. 

 E. C. Pickering. 



Professor 



The Progress of Science. 



Doctorates conferred by American Universities; 

 Aerial Navigation ; The Photography of Aquatic 

 Animals in their Natural Environment ; Scientific 

 Items. 



CONTENTS OF NOVEMBER NUMBER 



Deductions from the Records of Running in the Last 

 Olympiad. Professor A. E. Kennelly. 



Monte Alban and Mitla as the Tourist sees them. 

 Professor Charles Joseph Chamberlain. 



The Rotation of Crops. Samuel Fraskr . 



The Public School Teacher in a Democracy. 

 Henry R. Linville. 



Dr. 



Celibate Education To-day. E. S. 



The Inadequacy of Speech. Dr. Chas. W. Super. 



Zoology. Professor Henry E. Crampton. 



Experiments with Langley's Aerodrome . The Late 

 Dr. S. P. Langley. 



The Progress of Science : 



The Fiftieth Anniversary of the Announcement 

 of the Theory of Natural Selection ; The Dublin 

 Meeting of the British Association ; The Present 

 Pandemic of the Plague ; Scientific Items. 



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