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Volume 31(4);  April 1945
The cover of the journal
Article
Awards to the Academy and Research Council
Proc Natl Acad Sci U S A. 1945 April; 31(4): 120–123.
PMCID: PMC1078771
Chemistry
Vitamin A in Relation to Aging and to Length of life
H. C. Sherman, H. L. Campbell, Madeline Udiljak, and Helen Yarmolinsky
Proc Natl Acad Sci U S A. 1945 April; 31(4): 107–109.
PMCID: PMC1078768
Mathematics
Axiomatic Approach to Homology Theory
Samuel Eilenberg and Norman E. Steenrod
Proc Natl Acad Sci U S A. 1945 April; 31(4): 117–120.
PMCID: PMC1078770
Irregular Projective Invariants
Edward Kasner and John De Cicco
Proc Natl Acad Sci U S A. 1945 April; 31(4): 123–125.
PMCID: PMC1078772
Euler's Three Biquadrate Problem
Morgan Ward
Proc Natl Acad Sci U S A. 1945 April; 31(4): 125–127.
PMCID: PMC1078773
Pathology
The Law of Mass Action in Epidemiology: II
Edwin B. Wilson and Jane Worcester
Proc Natl Acad Sci U S A. 1945 April; 31(4): 109–116.
PMCID: PMC1078769
Erratum
Dominance Modification and Physiological Effects of Genes
Proc Natl Acad Sci U S A. 1945 April; 31(4): 127.
PMCID: PMC1078774
Corrects: L. C. Dunn, et al. Dominance Modification and Physiological Effects of Genes. Proc Natl Acad Sci U S A. 1945 February; 31(2): 82–84.
Journal Matter
Original table of contents page
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Administrative content — journal masthead, notices, indexes, etc.
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