The Popular Science Monthly 



Sntered in the Pott Ojjioe in Lanoaater, Pa., tu tMtmd-vUui matUr. 



CONTENTS OF FEBRUARY NUMBER 



Professor W. Q. Farlow. Frontispiece. 



Scientific Investigation and Progresg. President 

 Iba Remsen. 



Comrades in Zeal. President David Stabr Jordan. 

 The Predecessors of Copernicus. Dr. Edward S. 



HOLDEN. 



The Conservation of Energy in those of Advancing 

 Years. Dr. J. Madison Taylor. 



The Geographical Distribution of Meteorites. Dr. 

 Oliver C. Fabrington. 



Washington University. Charles P. Pettus. 



Bhat is Group Theory ? Professor G. A. Miller. 



The Progress of Science : 



Convocation Week Meetings of Scientific Socie- 

 ties ; The St. Louis Exposition and its Congress 

 of Arts and Science; The Scientific Basis of 

 Cheese-Making; Scientific Items. 



CONTENTS OF MARCH NUMBER 



Aerial Navigation. O. Chanute. 



The Metric System: Shall it be Compulsory? Pro- 

 fessor W. L,E Conte Stevens. 



The Conservation of Energy in Those of Advancing 

 Years. Dr. J. Madison Taylor. 



The Royal Prussian Academy of Science, Berlin. 

 Edward F. Williams. 



The Tropical Station of Cinchona, Jamaica. Dr. N. 

 L. Britton. 



Education and Industry. Professor Edw. D Jones. 



Evolution Not the Origin of Species. O. F. Cook. 



Some Historical Aspects of Vegetarian iera. Pro- 

 fessor Lafayette B. Mendel. 



Tokyo Teikoka Dragaku (The Imperial University 

 of Tokyo). Nachide Yatsu. 



The Progress of Science : 



Immanuel Kant ; Recent Progress in the .^tudy 

 of Radio-activity ; New Buildi gs for the Depart- 

 ment of Agriculture in Washington. Scientific 



Items. 



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