Vol. LXIX. No. 3 SEPTEMBER, 1906
THE
POPULAR SCIENCE MONTHLY.
EDITED BY J. McKEEN CATTELL CONTENTS
The Value of Science. M. H. Poincare 193
Discontinuous Variation in Pedigree-cultures. Dr. D. T. MacDougal . 207
America and Seismological Research. Dr. William Herbert Hobbs . 228 Immunity in Tuberculosis. Dr. Simon Flexner 229
The Protection of the Alluvial Basin of the Mississippi. Robert Mar- shall Brown ... 248
The Jews, a Study of Race Environment. Maurice Fishberg .... 257
The Development of Mechanics. Dr. S. E. Slocum 268
Diamonds and Carbons in Brazil. H. W. Furniss 272
Shorter Articles :
Sigma Xi:M.B 281
The Progress of Science :
The Bureau of Education ; Professor Mendeleeff ; Appropriations for the Depart- ment of Agriculture ; The Will of Alfred Beit ; Scientific Items 283
THE SCIENCE PRESS
LANCASTER, PA. GARRISON, N. Y.
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copykight, 1906, bt the science press
