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
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CoptbighT; 1906, BT THE SCIENCE PRESS
