Voi. LXXIX, No. 5. NOVEMBER, 1911 



THE 



POPULAR SCIENCE 

 MONTHLY 



EDITED BY J. MoKEEJf CATTELL 



CONTENTS 



The Bering River Coal Field, Alaska. Professor George F. Kay . .417 



Insect Parasitism and its Peculiarities. Professor William Morton 



Wheeler 431 



Mathematics and Engineering in Nature. Professor Arnold Emch . 450 



American Mathematics. Professor G. A. Miller 459 



Buffon and the Problem of Species. Professor Arthur 0. Lovejoy. . 464 



A World-wide Color Line. Professor U. G. Weatherly . . . 474 



The Crossing of the Races. Dr. J. G. Wilson 486 



The Conservation of the Food-supply. Dr. Henry Prentiss Armsby . 496 



The Moral Influence of a University Pension System. Dr. Henry S. 



Pritchett 502 



The Progress of Science : 



College Studies and Professional Training ; The Portsmouth Meeting of the British 

 Association ; A Hand-hook of Universities ; Scientific Items . . . .514 



THE SCIENCE PRESS 



LANCASTER, PA. GARRISON, N. Y. 



NEW YOKE : Sub-Station 84 

 Single Number, 30 Cents Yearly Subscription, $3.00 



COPYBIGHT, 1910, BY THE SCIENCE PRESS 



