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Science, New Series, Vol. 115, No. 2978, Jan. 25, 1952


Previous Issue: New Series, Vol. 115, No. 2977, Jan. 18, 1952
Next Issue: New Series, Vol. 115, No. 2979, Feb. 1, 1952


Front Matter (1 p.)
The Mitochondrial System, pp. 3a
D. E. Green

Partial Reinforcement and Conditioned Heart Rate Response in Human Subjects, pp. 77-79
J. M. Notterman; W. N. Schoenfeld; P. J. Bersh

News and Notes, pp. 79-83


Technical Papers
The Absence of Dietary Effects on the DNA Content of Liver Nuclei of the Adult Rat, p. 84
Rosa M. Campbell; H. W. Kosterlitz
A New Class of Organic Fungicides, pp. 84-86
A. R. Kittleson
Pre-Cambrian Uraninite, Sunshine Mine, Idaho, pp. 86-88
Paul F. Kerr; J. Laurence Kulp
The Natural Resistance of the Golden Hamster to Colchicine, pp. 88-89
Margaret Ward Orsini; Ben Pansky
The Turnover Time of Phosphorus in Normal, Sickle Cell Trait, and Sickle Cell Anemia Blood in vitro as Measured with P, pp. 89-90
Herman Branson; L. Otto Banks
Control of Covered Smut of Wheat by Rapid Seed Treatment with an Antibiotic, pp. 90-91
A. W. Henry; R. L. Millar; E. A. Peterson
An Improved Method for Measuring Coagulation Time, pp. 91-92
David I. Macht; Thomas Hoffmaster
The Action of Ultraviolet Light on the Pentose Moiety of Nucleic Acids and Related Compounds, pp. 92-93
Eugene W. Rice
Plastics in Trace Element Research, pp. 93-94
Iris Dozer; Marjorie Dole
Microradiography of Microfossils with X-Ray Diffraction Equipment, pp. 94-95
Ruth A. M. Schmidt
The Use of an Ion Exchange Resin for the Hydrolysis of Casein and Coffee Proteins, pp. 95-96
G. E. Underwood; F. E. Deatherage


Comments and Communications
Teacher Training, pp. 96-98
William Schriever
Age of Folsom Man, p. 98
E. H. Sellards
Selective Application of Selective Herbicides in the Study of Vegetation Development, pp. 98-99
Frank E. Egler


Book Reviews
----------------, pp. 99-100
Laboratory Design
H. S. Coleman
Review author[s]: Chester Nagel
----------------, p. 100
Cybernetics: Circular Causal and Feedback Mechanisms in Biological and Social Systems
Heinz Von Foerster
Review author[s]: M. D. Steer
----------------, p. 100
The Kidney: Medical and Surgical Diseases
Arthur C. Allen
Review author[s]: A. C. Corcoran

Previous Issue: New Series, Vol. 115, No. 2977, Jan. 18, 1952
Next Issue: New Series, Vol. 115, No. 2979, Feb. 1, 1952



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