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Science, New Series, Vol. 88, No. 2290, Nov. 18, 1938


Previous Issue: New Series, Vol. 88, No. 2289, Nov. 11, 1938
Next Issue: New Series, Vol. 88, No. 2291, Nov. 25, 1938


Front Matter (5 pp.)
Fifty Years of American Mathematics, pp. 461-467
George D. Birkhoff


Obituary
Guy N. Collins, pp. 467-468
J. H. Kempton
Recent Deaths and Memorials, p. 468


Scientific Events
United States Standards in Argentina, pp. 468-469
The Annual Meeting of the American Society of Mechanical Engineers, p. 469
The Mathematical Association of America, pp. 469-470
Award of the Penrose Medal to Professor Lawson, p. 470


Scientific Notes and News, pp. 470-473


Discussion
A Measure of the Flight Capacity of Grasshoppers, pp. 473-474
J. A. Munro; Stanley Saugstad
Authority Citations Again, p. 474
Joshua L. Baily
A Reversed Cat, p. 475
Helen A. Wragg
Elliptical Erythrocytes, p. 475
M. C. Terry
M(anille) Ide, the Discoverer of "Bios", p. 475
Roger J. Williams


The National Academy of Sciences
Abstracts of Papers Presented at the Chapel Hill Meeting of the National Academy of Sciences. II, pp. 475-479


Special Articles
The Secretion of Iodine by Thyroid Glands Cultivated in the Lindbergh Pump, pp. 479-480
Lillian E. Baker
Photographic Nature of Tanning of the Human Skin as Shown by Studies of Male Hormone Therapy, p. 481
James B. Hamilton; Gilbert Hubert
Action of Vanadium on Tissue Oxidations, pp. 481-482
Frederick Bernheim; Mary L. C. Bernheim
A Comparative Study of the Subterranean Members of Three Field Grasses, p. 482
Howard J. Dittmer


Science News, pp. 10a+12a+14a

Previous Issue: New Series, Vol. 88, No. 2289, Nov. 11, 1938
Next Issue: New Series, Vol. 88, No. 2291, Nov. 25, 1938



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