The Popular Science Monthly 



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



CONTENTS OF THE NOVEMBER NUMBER 



The Bering River Coal Field, Alaska. Professor 



George F. Kay. 

 Insect Parasitism and its Peculiarities. Profefisor 



William Morton Wheeler. 

 Mathematics and Engineering in Nature. Professor 



Arnold Emch. 

 American Mathematics. Professor G. A. Miller. 

 Buffon and the Problem of Species. Professor Arthur 



O. Lovejoy. 

 A World-wide Color Line. Professor U. G. Weatherly. 

 The Crossing of the Races. Dr. J G. Wilson. 

 The Conservation of the Food-supply Dr. Henry 



Prentiss Armsby. 

 The Moral Influence of a University Pension System. 



Dr. Henry S. Pritchett. 



The Progress of Science : 



College Studies and Professional Training ; The 

 Portsmouth Meeting of the British Association ; 

 A Hand-book of Universities ; Scientific Items. 



CONTENTS OF THE DECEMBER NUMBER 



Science among the Chinese. Dr. C. K. Edmunds. 



Why do Certain Living Forms Produce Light ? F. 

 Alex. McDermott. 



The Water Relations of Desert Plants. Dr. D. T. Mac- 

 Dougal. 



Buflon and the Problem of Species, Profefcsor Arthur 

 O. Lovejoy. 



Protozoan Germ Plasm. Professor Gary N. Calkins 



Adamas. or the Symmetries of Isometric Crystals. 

 Professon B. K. Emerson. 



The Lack of Printing in Antiquity, Frederic Drew 

 Bond. 



Is Vegetarianism Capable of World-wide Application ? 

 Professor Alonzo Englebert Taylor. 



A Bugbear of Economics. Professor Herbert Adol- 

 phus Miller. 



The Germans at School. Professor Hugo Miinster- 



berg. 

 The Progress of Science: 



The Stationary Population of France ; The Zoo- 

 logical Laboratory of the University of Pennsyl- 

 vania ; Scientific Items. 

 Index to Volume LXXIX. 



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