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Volume 35(2);  February 1949
The cover of the journal
Bacteriology
Effect of Visible Light on the Recovery of Streptomyces Griseus Conidia from Ultra-violet Irradiation Injury
Albert Kelner
Proc Natl Acad Sci U S A. 1949 February; 35(2): 73–79.
PMCID: PMC1062964
Biochemistry
The Mode of Action of the Metal-Peptidases
Emil L. Smith
Proc Natl Acad Sci U S A. 1949 February; 35(2): 80–90.
PMCID: PMC1062965
Chemistry
Further Experiments with Vitamin A in Relation to Aging and to Length of Life
Henry C. Sherman and Helen Yarmolinsky Trupp
Proc Natl Acad Sci U S A. 1949 February; 35(2): 90–92.
PMCID: PMC1062966
Mathematics
On Difference Sets
S. Chowla
Proc Natl Acad Sci U S A. 1949 February; 35(2): 92–94.
PMCID: PMC1062967
Characters over Certain Types of Rings with Applications to the Theory of Equations in a Finite Field
L. K. Hua and H. S. Vandiver
Proc Natl Acad Sci U S A. 1949 February; 35(2): 94–99.
PMCID: PMC1062968
Bayes Solutions of Sequential Decision Problems
A. Wald and J. Wolfowitz
Proc Natl Acad Sci U S A. 1949 February; 35(2): 99–102.
PMCID: PMC1062969
Pathology
Pharmacological Modification of Resistance to Radiation—A Preliminary-Report
John B. Graham and Ruth M. Graham
Proc Natl Acad Sci U S A. 1949 February; 35(2): 102–106.
PMCID: PMC1062970
Physics
Physical Systems of Curves in Space
Edward Kasner and John De Cicco
Proc Natl Acad Sci U S A. 1949 February; 35(2): 106–108.
PMCID: PMC1062971
Zoology
Conjugation Between Double Monsters and Single Animals in Paramecium Bursaria
Tze-Tuan Chen
Proc Natl Acad Sci U S A. 1949 February; 35(2): 108–111.
PMCID: PMC1062972
The Nature of the Specificity of Methyl Green for Chromatin
Arthur W. Pollister and Cecilie Leuchtenberger
Proc Natl Acad Sci U S A. 1949 February; 35(2): 111–116.
PMCID: PMC1062973
Erratum
Some Properties of Rotational Flow of a Perfect Gas
Proc Natl Acad Sci U S A. 1949 February; 35(2): 116.
PMCID: PMC1062974
Corrects: P. Neményi, et al. Some Properties of Rotational Flow of a Perfect Gas. Proc Natl Acad Sci U S A. 1948 March; 34(3): 119–124.
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