Vol. LXXV. No. 6. DECEMBER, 1909 



THE 



POPULAR SCIENCE 

 MONTHLY 



EDITED BY J. McKEEN CATTELL 



CONTENTS 



The Planet Venus. Dr. Pbrcival Lowell 521 



The Argument for Organic Evolution before the " Origin of Species." 

 Professor Arthur O. Lovejoy 537 



An Arraignment of the Theories of Mimicry and Warning Colors. 



Abbott H. Thayer 550 



What Pragmatism is, as I understand it. Thomas Mitchell Shackleford 571 



Immigration and the Future American Race. Dr. Albert Alleman . 586 



Environment and Productive Scholarship. Dr. W. J. Humphreys . . 587 



Medieval Creation Myths. Professor B. K. Emerson 610 



The Progress of Science : 



The Medical School and the College; Kakichi Mitsukuri, 1858- 

 1909 ; The Spruce Tree House of the Mesa Verde National Park ; 

 Scientific Items 614 



Index to Volume LXXV 621 



THE SCIENCE PRESS 



LANCASTER, PA. GARRISON, N. Y. 



NEW YOEK: Sub-Station 84 



Single Number, 30 Cents Yearly Subscription, $3.00 



Copyright, 1908, by THE SCIENCE PRESS 



