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Science, New Series, Vol. 117, No. 3043, Apr. 24, 1953


Previous Issue: New Series, Vol. 117, No. 3042, Apr. 17, 1953
Next Issue: New Series, Vol. 117, No. 3044, May 1, 1953


Front Matter (1 p.)
Important Notice to Contributors, p. 3
The Editorial Board

Publications Received, p. 4
A Reconsideration of the Somatic Mutation Theory of Cancer in the Light of Some Recent Developments, pp. 441-445
John C. Fardon

News and Notes, pp. 445-448


Technical Papers
Reversal of Gram-Staining Behavior, p. 449
P. Larose; Roland Fischer
Formation of a Labile Pigment in Rabbit Ova during Histochemical Demonstration of Succinic Dehydrogenase, pp. 449-451
Alvan G. Foraker; Sam W. Denham; Dorothy D. Mitchell
Paper Chromatography of Corticosteroids, pp. 451-452
E. H. Sakal; E. J. Merrill
Microanatomical Study of DDT-Moribund Anopheles quadrimaculatus Say, pp. 452-453
Jack Colvard Jones
A Rapid Screening Test for the Determination of the Approximate Cholinesterase Activity of Human Blood, pp. 453-455
George Limperos; Katherine E. Ranta
Mutation of Mating Type in Saccharomyces cerevisiae, pp. 455-456
S. Pomper; D. W. McKee
A Naturally Occurring Antiauxin, pp. 456-457
R. H. Roberts
Simplified Planigraphic Tube Motion, pp. 458-459
Irving J. Kane
Observations on the Cobalt Enhancement of Penicillin Activity against Salmonella pullorum, pp. 459-460
Abe Pital; H. J. Stafseth; E. H. Lucas


Comments and Communications
Terraced Canyons, pp. 461-463
William Herbert Hobbs


Book Reviews
----------------, p. 463
Atomic Energy Levels as Derived from the Analyses of Optical Spectra, 24Cr-41Nb
Charlotte E. Moore
Review author[s]: K. W. Meissner
----------------, p. 463
Rheumatic Diseases: Diagnosis and Treatment
Eugene F. Traut
Review author[s]: Howard F. Polley
----------------, p. 464
A Textbook of Arthropod Anatomy
R. E. Snodgrass
Review author[s]: A. Glenn Richards


Association Affairs
Laurentian Hormone Conference, p. 464
Gregory Pincus

Previous Issue: New Series, Vol. 117, No. 3042, Apr. 17, 1953
Next Issue: New Series, Vol. 117, No. 3044, May 1, 1953



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