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Volume 31(5);  May 1945
The cover of the journal
Anatomy
On Epinephrine and Retinal Photomechanical Responses
S. R. Detwiler
Proc Natl Acad Sci U S A. 1945 May; 31(5): 137–142.
PMCID: PMC1078779
Bacteriology
Strain Specificity and Production of Antibiotic Substances: IV. Variations Among Actionomycetes, with Special Reference to Actinomyces Griseus
Albert Schatz and Selman A. Waksman
Proc Natl Acad Sci U S A. 1945 May; 31(5): 129–137.
PMCID: PMC1078778
Engineering
The Velocity of Propagation of Brittle Cracks in Steel
M. Greenfield and G. Hudson
Proc Natl Acad Sci U S A. 1945 May; 31(5): 150–152.
PMCID: PMC1078782
Mathematics
Groups Having a Small Number of Sets of Conjugate Subgroups
G. A. Miller
Proc Natl Acad Sci U S A. 1945 May; 31(5): 147–150.
PMCID: PMC1078781
Pathology
The Variation of Infectivity
Edwin B. Wilson and Jane Worcester
Proc Natl Acad Sci U S A. 1945 May; 31(5): 142–147.
PMCID: PMC1078780
Journal Matter
Original table of contents page
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