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Science, New Series, Vol. 91, No. 2372, Jun. 14, 1940


Previous Issue: New Series, Vol. 91, No. 2371, Jun. 7, 1940
Next Issue: New Series, Vol. 91, No. 2373, Jun. 21, 1940


Front Matter (9 pp.)
Minute Amounts of Chemical Elements in Relation to Plant Growth, pp. 557-560
D. R. Hoagland

Science in General Education at the College Level, pp. 560-565
Lloyd W. Taylor


Scientific Events
Conferences in Biochemistry at the University of Chicago, p. 565
Honorary Degrees Conferred by New York University, pp. 565-567
Honorary Degrees Conferred by Columbia University, p. 567
Dinner in Honor of Professor McClung, pp. 567-568
Recent Deaths, p. 568


Scientific Notes and News, pp. 568-571


Discussion
Fundamental Laws of Operations in Mathematics, pp. 571-572
G. A. Miller
Stability in Nomenclature, pp. 572-573
A. C. Smith
Aneuploidy in a Hepatic Species, p. 573
G. B. Wolcott
Eating of Bone by the Pregnant and Lactating Gray Squirrel, p. 573
A. J. Carlson


Scientific Books
Cosmic Rays, pp. 574-575
Cosmic Rays
R. A. Millikan
Review author[s]: Gordon Ferrie Hull
Non-Uniform Gases, p. 575
The Mathematical Theory of Non-Uniform Gases
S. Chapman; T. G. Cowling
Review author[s]: William Phelps Allis


Societies and Meetings
The North Carolina Academy of Science, pp. 575-576
Bert Cunningham


Special Articles
Biotin (Bios IIB, Vitamin H)--An Essential Growth Factor for Certain Staphylococci, pp. 576-577
J. R. Porter; Michael J. Pelczar
Changes in the Connective Tissue of the Uterus and Vagina of the Rat Associated with Advancing Age, pp. 577-578
J. M. Wolfe; Ethel Burack; Winifred Lansing; A. W. Wright
Radioactive Nitrogen in the Study of N2 Fixation by Non-Leguminous Plants, pp. 578-579
S. Ruben; W. Z. Hassid; M. D. Kamen


Scientific Apparatus and Laboratory Methods
Heparin as an Anticoagulant for Permeability Studies, p. 579
F. R. Hunter; L. D. Stringer; H. D. Weiss
A New Technic for Staining Vaginal Smears: II, pp. 579-580
Ephraim Shorr
Solutions of Chlorophyll in Salt Water, p. 580
John Shafer


Science News, pp. 8-10

Previous Issue: New Series, Vol. 91, No. 2371, Jun. 7, 1940
Next Issue: New Series, Vol. 91, No. 2373, Jun. 21, 1940



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