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Volume 31(12);  December 1945
The cover of the journal
Bacteriology
The Synthesis of Butyric and Caproic Acids from Ethanol and Acetic Acid by Clostridium Kluyveri
H. A. Barker, M. D. Kamen, and B. T. Bornstein
Proc Natl Acad Sci U S A. 1945 December; 31(12): 373–381.
PMCID: PMC1078850
Biochemistry
Respiratory Enzymes in Paramecium: 1. Cytochrome Oxidase
Edgar J. Boell
Proc Natl Acad Sci U S A. 1945 December; 31(12): 396–402.
PMCID: PMC1078853
Genetics
The Differential Equation of the Distribution of Gene Frequencies
Sewall Wright
Proc Natl Acad Sci U S A. 1945 December; 31(12): 382–389.
PMCID: PMC1078851
Mathematics
Markoff Chains with Reverse Transitions
I. Opatowski
Proc Natl Acad Sci U S A. 1945 December; 31(12): 411–414.
PMCID: PMC1078856
Generalized Arc-Sets
A. D. Wallace
Proc Natl Acad Sci U S A. 1945 December; 31(12): 414–417.
PMCID: PMC1078857
Two Mean Theorems in Hilbert Space
Ky Fan
Proc Natl Acad Sci U S A. 1945 December; 31(12): 417–421.
PMCID: PMC1078858
Physiology
Effect of Smoking on Taste Thresholds for Phenyl-Thio-Carbamide (PTC)
Ada R. Hall and Albert F. Blakeslee
Proc Natl Acad Sci U S A. 1945 December; 31(12): 390–396.
PMCID: PMC1078852
Zoölogy
Offspring from Unborn Mothers
W. L. Russell and Patricia M. Douglass
Proc Natl Acad Sci U S A. 1945 December; 31(12): 402–404.
PMCID: PMC1078854
Induction of Conjugation in Paramecium Bursaria Among Animals of One Mating Type by Fluid from Another Mating Type
Tze-Tuan Chen
Proc Natl Acad Sci U S A. 1945 December; 31(12): 404–410.
PMCID: PMC1078855
Journal Matter
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