Vol. LXIX. No. 5 NOVEMBER, 1906 



THE 



POPULAR SCIENCE 

 MONTHLY. 



EDITED BY J. McKEEN CATTELL 

 CONTENTS 



University Control. Professor J. J. Stevenson 385 



The Value of Science. M. H. Poincare 398 



Pathogenic Protozoa. Professor Gary N. Calkins 409 



The Making of the Grand Canon of the Colorado. Professor A. K. Crook 417 



Notes on the Development of Telephone Service. Fred De Land . . 425 



The Jews : a Study of Race and Environment. Dr. Maurice Fishberg . 441 



John Stuart Mill. Percy F. Bicknell 451 



Changes of Climate. Robert DeC. Ward 458 



The African Pygmies. S. P. Verner 471 



The Progress of Science : 



The Jubilee of the Coal-tar Color Industry and Sir William Henry Perkin ; The Royal 

 Society ; The York Meeting of the British Association ; Scientific Items .... 475 



THE SCIENCE PRESS 



LANCASTER, PA GARRISON, N. Y. 



NEW YORK: Sub-Station 84 

 Single Number, 30 Cents Yearly Subscription, $3.00 



CoptbighT; 1906, BT THE SCIENCE PRESS 



