Articles

 Assistting Less Developed Countries

J. T.
Science 9 December 1960: 1735.
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 The East Pacific Rise

H. W. Menard
Science 9 December 1960: 1737-1746.
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 Research Overhead

L. A. DuBridge and Norman Kaplan
Science 9 December 1960: 1746-1749.
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 "Science" and Advertising: the Federal Trade Commission Is Seeking a Way to Curb Abuses

H. M.
Science 9 December 1960: 1749-1751.
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 State Department Restrictions on Meeting Participation Questioned

Science 9 December 1960: 1751-1756.
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 Presidential Transitions. Laurin L. Henry. Brookings Institution, Washington, D.C., 1960. 738 pp. $7.50

R. G. Tugwell
Science 9 December 1960: 1757-1758.
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 This Is the American Earth. Ansel Adams and Nancy Newhall. Sierra Club, San Francisco, Calif., 1960. xviii + 89 pp. Illus. $15

Edward S. Deevey
Science 9 December 1960: 1759.
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 Foundations of Modern Analysis. J. Dieudonné. Academic Press, New York, 1960. xiv + 361 pp. Illus. $10

Peter Frank
Science 9 December 1960: 1759.
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 Algenkunde. Bohuslav Fott. Fischer, Jena, 1959. vii + 482 pp. Illus. DM. 48.90

Paul C. Silva
Science 9 December 1960: 1759-1760.
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 Miscellaneous Publications

Science 9 December 1960: 1760.
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Limitations of the Competitive Exclusion Principle

D. B. O. Savile
Science 9 December 1960: 1761.
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Protactinium-231 Content of Ocean Water and Sediments

William M. Sackett
Science 9 December 1960: 1761-1762.
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Some Effects of Ionizing Radiation on Translocation in Plants

Kenneth L. Webb and Richard H. Hodgson
Science 9 December 1960: 1762-1763.
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Transplantation and Malignancy in a Companion-Host System on the Chorioallantoic Membrane

Joseph Leighton, Donald A. Dreyer, and Maurice J. Mahoney
Science 9 December 1960: 1763-1765.
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Relationship between Reaction Time and Electroencephalographic Alpha Phase

Enoch Callaway, III and Charles L. Yeager
Science 9 December 1960: 1765-1766.
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Use of Pectinase in Preparation of Mitochondria from Tobacco-Tissue Cultures

Taiki Tamaoki, A. C. Hildebrandt, and A. J. Riker
Science 9 December 1960: 1766-1767.
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Isolation of Listeria monocytogenes from Oat Silage

M. L. Gray
Science 9 December 1960: 1767-1768.
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Thermal Annealment and Nitric Oxide Effects on Free Radicals in X-irradiated Cells

C. F. Ehret, B. Smaller, E. L. Powers, and R. B. Webb
Science 9 December 1960: 1768-1769.
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Simultaneous Generalization Gradients for Appetitive and Aversive Behavior

Eliot Hearst
Science 9 December 1960: 1769-1770.
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Properties of the Major Component of a Peptic Digest of Rabbit Antibody

A. Nisonoff, F. C. Wissler, and L. N. Lipman
Science 9 December 1960: 1770-1771.
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 Letters to the Editor

Merritt A. Williamson
Science 9 December 1960: 1772.
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 Left-handed Subjects

Sidney Weinstein
Science 9 December 1960: 1772.
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 Migration of Marine Organisms

J. Swarbrick
Science 9 December 1960: 1774.
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 Forthcoming Events

Science 9 December 1960: 1774-1778.
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 New Products

Joshua Stern
Science 9 December 1960: 1780.
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