Vol. LXXX,No. 6. JUNE, 1912 



THE 



OPULAR SCIENCE 

 MONTHLY 



EDITED BT J McKEEJf CdTTELL 



CONTENTS 



Tropical Sunlight. The Late Dr. Paul C. Freer .... 521 

 The National Parks, from the Scientific and Educational Side. Laubence 



F. SCHMECKEBIER . .- . . . . . . . . 531 



Research in Medicine. Professor Richard M. Pearce . . . 548 



Age, Death and Conjugation in the Light of Work on the Lower Organ- 

 isms. Professor Herbert S. Jennings ...... 563 



Conservation Ideals in the Improvement of Plants. Dr. H. J. Webber 578 

 A Philosophy of Geography. Professor Walter Edward McCourt . 587 

 Chinese Mathematics. Professor David Eugene Smith . . . 597 

 The Practical Basis for Republican Institutions for China. Gustavus 



Ohlinger . . . V . . . . . . . . 602 



A Program of Radical Democracy. J. McKeen Cattell . . . 606 



The Progress of Science : 



Crawford W. Long and the Use of Anesthetics in Surgery ; The Scientific Pro- 

 gram of the American Philosophical Society ; The Foreign-born Population of 

 New York ; Scientific Items . .' . . . . . .616 



Index to Volume LXXX 621 



THE SCIENCE PRESS 



LANCASTER, PA. GARRISON, N. Y. 



NEW YOKE: Sub-Station 84 

 SmoLB Number, 30 Cents Yearly Subscription, $3.00 



COFTBIOBT, 1911, BT THB SCIENCE PRESS 



