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Science, New Series, Vol. 104, No. 2710, Dec. 6, 1946


Previous Issue: New Series, Vol. 104, No. 2709, Nov. 29, 1946
Next Issue: New Series, Vol. 104, No. 2711, Dec. 13, 1946


The Need for Ichthyological Surveys of the Major Rivers of Western North America, pp. 517-519
Robert R. Miller

Theory and Prediction in Science, pp. 520-521
Rudolf Carnap

A Focus of Sylvatic Plague on the Peruvian-Ecuadorian Frontier, p. 522
Atilio Macchiavello

Program: One Hundred Thirteenth Meeting, American Association for the Advancement of Science: Boston, 26-31 December 1946, pp. 523-534
News and Notes, pp. 535-543
Science Exhibition, pp. 544-554


Letters to the Editor
On the Etiology of Clubbing of the Fingers, p. 555
Edgar F. Mauer
Exploration for ``Big Bones'' at Lower Blue Licks Spring, Kentucky, pp. 555-556
Willard Rouse Jillson
The Immunizing Effect in the Action of Trypanocidal Agents, p. 556
Clifford S. Leonard
Thiophene-Free Benzene, p. 557
R. J. Graul; J. V. Karabinos
Pyridylmercuric Acetate as a Prophylactic in Fisheries Management, p. 557
Willis M. Van Horn; Max Katz
A View on Soviet Russia from Italy, p. 557
Samuel Levy
A View on Soviet Russia from Italy, p. 557
Samuel Levy


Book Reviews
----------------, pp. 557-558
Crop Production and Environment
R. O. Whyte
Review author[s]: Kenneth V. Thimann
----------------, p. 558
Practical Malariology
Paul F. Russell; Luther S. West; Reginald D. Manwell
Review author[s]: Ernest Carroll Faust
----------------, p. 558
Penicillin: Its Practical Application
Alexander Fleming
Review author[s]: Chester S. Keefer

Previous Issue: New Series, Vol. 104, No. 2709, Nov. 29, 1946
Next Issue: New Series, Vol. 104, No. 2711, Dec. 13, 1946



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