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Science, New Series, Vol. 83, No. 2148, Feb. 28, 1936


Previous Issue: New Series, Vol. 83, No. 2147, Feb. 21, 1936
Next Issue: New Series, Vol. 83, No. 2149, Mar. 6, 1936


Front Matter (2 pp.)


The American Association for the Advancement of Science
Problems and Progress on the Geologico-Seismological Frontier, pp. 193-198
James B. Macelwane


Obituary
James Hartley Ashworth, p. 198
E. G. Conklin
Recent Deaths and Memorials, p. 199


Scientific Events
Commission on Nutrition of the League of Nations, p. 199
The Natural History Society of Maryland, pp. 199-200
Professor Ames and Professor Jack of the Arnold Arboretum, pp. 200-201


Scientific Notes and News, pp. 201-203


Discussion
The Conservation of Public Lands, pp. 204-205
C. L. Shear
Note on the Present Sun-Spot Cycle, p. 205
Harlan T. Stetson
Deep-Focus Earthquakes and Isostasy, p. 206
V. C. Stechschulte
The New Ergot Alkaloid, pp. 206-207
M. S. Kharasch; H. King; A. Stoll; Marvin R. Thompson


Scientific Books
Insect Enemies of Shade Trees, pp. 207-208
Insect Enemies of Shade Trees
Glenn W. Herrick
Review author[s]: E. P. Felt
College Physics, pp. 208-209
College Physics
Mendenhall; Eve; Keys
Review author[s]: E. P. T. Tyndall


Reports
The Third Annual Tri-States (Illinois, Wisconsin, Iowa) Geological Field Conference, p. 209
A. C. Trowbridge


Special Articles
The Bar "Gene" a Duplication, pp. 210-211
Calvin B. Bridges
A New Method for Testing the Sense of Smell and for the Establishment of Olfactory Values of Odorous Substances, pp. 211-212
Charles A. Elsberg; Irwin Levy; Earl D. Brewer


Scientific Apparatus and Laboratory Methods
Glass Electrode with Galvanometer Reading, pp. 213-214
Leonor Michaelis
A Simplified Procedure for the Volumetric Measurement of Serially Sectioned Structures, p. 214
William Etkin


Books Received, p. 214
Science News, pp. 6a-8a

Previous Issue: New Series, Vol. 83, No. 2147, Feb. 21, 1936
Next Issue: New Series, Vol. 83, No. 2149, Mar. 6, 1936



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