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Science, New Series, Vol. 90, No. 2329, Aug. 18, 1939


Previous Issue: New Series, Vol. 90, No. 2328, Aug. 11, 1939
Next Issue: New Series, Vol. 90, No. 2330, Aug. 25, 1939


Front Matter (3 pp.)
Food, Drink and Evolution, pp. 145-149
Charles T. Brues


Scientific Events
The First Hundred Years of Photography, p. 150
Foreign Markets for Medicinal Products of the United States, p. 150
The Rochester Athenaeum and Mechanics Institute, pp. 150-151
Biochemical Research at the University of Pittsburgh, p. 151
The Third International Cancer Congress, pp. 151-152
The Bicentenary of the Royal Swedish Academy of Sciences, p. 152
The Hundredth Anniversary of the Birth of Robert Henry Thurston, pp. 152-153
Recent Deaths and Memorials, p. 153


Scientific Notes and News, pp. 153-155


Discussion
Compound Words, pp. 155-157
Sterling B. Talmage; R. H. Baugh; Oran Raber; Marjorie Fuller; Jane McMasters
Value of Characters of the Undeveloped Shoot in Identifying Plants, pp. 157-158
H. D. Harrington
Cystine and Methionine Requirements for Growth and Lactation, p. 158
J. R. Haag; L. D. Wright


Scientific Books
The Theory of Numbers, pp. 158-159
An Introduction to the Theory of Numbers
G. H. Hardy; E. M. Wright
Review author[s]: George D. Birkhoff
The Principles of Insect Physiology, p. 159
The Principles of Insect Physiology
V. B. Wigglesworth
Review author[s]: R. E. Snodgrass


Societies and Meetings
The Royal Society of Canada, pp. 159-161


Special Articles
Copper and Vitamin C Effects upon the Excised Frog Heart, p. 162
Hubert B. Peugnet
Prolonged Therapeutic Effect of Subcutaneously Implanted Crystals of Ovarian Hormone in Women, pp. 162-163
Udall J. Salmon; Robert I. Walter; Samuel H. Geist
The Influence of 3-Indole-Acetic Acid on Pollen Germination, pp. 163-164
Paul F. Smith
The Vitamin C Content of Spring Greens, pp. 164-165
R. C. Burrell; Helena A. Miller


Scientific Apparatus and Laboratory Methods
A Thermal Method for the Separation of Gases and Isotopes, pp. 165-166
Arthur Bramley; A. Keith Brewer


Books Received, p. 166
Science News, pp. 8a+10a+11a
Back Matter (1 p.)

Previous Issue: New Series, Vol. 90, No. 2328, Aug. 11, 1939
Next Issue: New Series, Vol. 90, No. 2330, Aug. 25, 1939



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