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Science, New Series, Vol. 93, No. 2417, Apr. 25, 1941


Previous Issue: New Series, Vol. 93, No. 2416, Apr. 18, 1941
Next Issue: New Series, Vol. 93, No. 2418, May 2, 1941


Front Matter (9 pp.)
Plant Research and Human Welfare, pp. 385-391
E. C. Auchter


Obituary
Wayne J. Atwell, pp. 391-392
R. R. Humphrey
Recent Deaths, p. 392


Scientific Events
The Permanent Science Fund of the American Academy of Arts and Sciences, pp. 392-393
Alumni Lectures at the University of Cincinnati, p. 393
S. B. Arenson
Awards in the William Lowell Putnam Mathematical Competition, pp. 393-394
Admissions to the Fellowship of the Royal Society, pp. 394-395


Scientific Notes and News, pp. 395-398


Discussion
Physicists Needed for National Defense Work, pp. 398-400
S. R. Williams
Petroglyphs as Criteria for Slope Stability, p. 400
T. N. Campbell; Ben R. Howard; Claude C. Albritton; Dodd N. Osburn
Manganese and Vitamin C, p. 401
Jackson B. Hester
Crystalline Insulin Derivatives, p. 401
E. H. Lang; L. Reiner


Scientific Books
Engineering, pp. 401-402
Stress Analysis and Design of Elementary Structures
James H. Cissel
Review author[s]: Francis P. Witmer
Embryology of an Echiuroid Worm, pp. 402-403
The Embryology of the Echiuroid Worm Urechis caupo
W. W. Newby
Review author[s]: Harold Heath


Reports
Ten-Year Research Program of the Virginia Geological Survey, pp. 403-404
Arthur Bevan


Special Articles
Absorption of Pellets of Crystalline Hormones, pp. 404-405
T. R. Forbes
Antagonistic Adrenal and Pituitary Effects on Body Salts and Water, pp. 405-406
S. W. Britton; E. L. Corey
Nutritional Factors Concerned in Rusting of Albino Rats, pp. 406-407
Harry S. Owens; Marvin Trautman; Ella Woods


Scientific Apparatus and Laboratory Methods
An Apparatus for Producing Constant Gas Mixtures, pp. 407-408
Roger A. Lewis; George F. Koepf
Simple Floor-Net for Catching the Escaped Laboratory Rodent, p. 408
Clyde E. Keeler


Science News, pp. 8-10

Previous Issue: New Series, Vol. 93, No. 2416, Apr. 18, 1941
Next Issue: New Series, Vol. 93, No. 2418, May 2, 1941



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