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Science, New Series, Vol. 73, No. 1894, Apr. 17, 1931


Previous Issue: New Series, Vol. 73, No. 1893, Apr. 10, 1931
Next Issue: New Series, Vol. 73, No. 1895, Apr. 24, 1931


Front Matter (4 pp.)
Individual Differences in Human Blood, pp. 403-409
Karl Landsteiner


Obituary
John Henry Comstock, pp. 409-410
James G. Needham
Memorials, pp. 410-411
Recent Deaths, p. 411


Scientific Events
The Calcutta Institute of Hygiene and Public Health, pp. 411-412
Field Expeditions of the Smithsonian Institution, p. 412
Meeting of the National Advisory Health Council, pp. 412-413
Research at the Mellon Institute, pp. 413-414


Scientific Notes and News, pp. 414-417


Discussion
A Method for Explanting the Kidney, p. 417
C. P. Rhoads
Central Bodies in the Sperm-Forming Divisions of Ascaris, pp. 417-418
Harwell P. Sturdivant
More about Shipworms, pp. 418-420
Paul Bartsch
The Russian Academy of Sciences, pp. 420-421
T. D. A. Cockerell
A Conference on Heredity as Applied to Man, p. 421
E. P. Lyon


Scientific Books
----------------, pp. 422-423
A Textbook of Plant Physiology
N. A. Maximov
Review author[s]: G. J. Peirce
----------------, pp. 423-424
Introduction à la Biologie Expérimentale. Les Êtres Organisés. Activités, Instincts, Structures
Paul Vignon
Review author[s]: John H. Gerould


Scientific Apparatus and Laboratory Methods
An Automatic Balance, pp. 424-426
F. J. Veihmeyer; C. H. Hofmann; C. V. Givan
Sectioning Orbitoid Foraminifera, pp. 426-427
Willard Berry


Special Articles
A Possible Physiological Interpretation of the Law of the Diminishing Increment, pp. 427-429
Walter A. Hendricks; Morley A. Jull; Harry W. Titus
The Rôle of Copper in the Setting and Metamorphosis of the Oyster, pp. 429-431
Herbert F. Prytherch
Experiments in Termite Caste Development, p. 431
Harold Heath
Dioecious Maize, p. 432
Donald F. Jones


Books Received, p. 432
Science News, pp. 10a-14a

Previous Issue: New Series, Vol. 73, No. 1893, Apr. 10, 1931
Next Issue: New Series, Vol. 73, No. 1895, Apr. 24, 1931



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