Vol. LXXV. No. 5. NOVEMBER, 1909 



THE 



POPULAR SCIENCE 

 MONTHLY 



EDITED BY J. McKEEN CATTELL 



CONTENTS 



The Shifting of the Earth's Axis. Dr. Sidney D. To wnley . . . .417 



Desert Scenes in Zacatecas. Professor J. E. Kirkwood . . . . . . 435 



The World of Life as Visualized and Interpreted by Darwinism. Dr. 



Alfred Russel Wallace 452 



Mental Inheritance. Dr. Madison Bentley 458 



Astronomical Superstitions. John Candee Dean 469 



Geographic Influences in the Development of Ohio. Professor Frank 



Carney 479 



The Decimal System of Numbers. Dr. L. C. Karpinski 490 



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



Professor Arthur O. Lovejoy 499 



The Progress of Science : 



Lord Kelvin ; A Photograph of Halley's Comet ; Scientific Items . 515 



THE SCIENCE PRESS 



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Copyright, 1908, by THE SCIENCE PRESS 



