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Science, New Series, Vol. 92, No. 2395, Nov. 22, 1940


Previous Issue: New Series, Vol. 92, No. 2394, Nov. 15, 1940
Next Issue: New Series, Vol. 92, No. 2396, Nov. 29, 1940


Front Matter (4 pp.)
The Efficient Parasite, pp. 465-469
N. H. Swellengrebel

The Kinetics of Contact Catalysts and the Industrial Background, pp. 469-471
Hugh Stott Taylor


Scientific Events
The Australian Committee on Animal Production, p. 472
The Dutch Elm Disease in Connecticut, pp. 472-473
Expedition to the Badlands of South Dakota, p. 473
Portraits of Distinguished Chemists, pp. 473-474
Lectures to the Laity of the New York Academy of Medicine, p. 474
Recent Deaths and Memorials, p. 474


Scientific Notes and News, pp. 474-477


Discussion
Perceptual Disorientation during Landing of Airplane, pp. 477-478
A. D. Moore
Frost Rings in Longleaf Pine, p. 478
Earl L. Stone
The Supervision of Publication, pp. 478-479
Richard L. Sutton
The Planning Committee of the Virginia Academy of Science, p. 479
E. C. L. Miller


Scientific Books
The Theory of Probability, pp. 479-480
Theory of Probability
Harold Jeffreys
Review author[s]: Arthur H. Copeland
Eugenics, pp. 480-481
Preface to Eugenics
Frederick Osborn
Review author[s]: Chas. B. Davenport


The National Academy of Sciences
Abstracts of Papers, pp. 481-484


Reports
The National Defense Research Committee, pp. 484-486


Special Articles
The Logistic Curve and the Census Count of 1940, pp. 486-488
Raymond Pearl; Lowell J. Reed; Joseph F. Kish
The Heparins of Various Mammalian Species and Their Relative Anticoagulant Potency, pp. 488-489
L. B. Jaques


Scientific Apparatus and Laboratory Methods
Electro-Foliar Diagnosis, pp. 489-490
C. H. Spurway
A Simple "Live" Trap, p. 490
M. W. Johnson


Science News, pp. 8+10-11
Back Matter (1 p.)

Previous Issue: New Series, Vol. 92, No. 2394, Nov. 15, 1940
Next Issue: New Series, Vol. 92, No. 2396, Nov. 29, 1940



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