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Volume 34(9);  September 1948
The cover of the journal
Bacteriology
On the Stability of Nutritional Mutants of Bacteria
Francis J. Ryan
Proc Natl Acad Sci U S A. 1948 September; 34(9): 425–435.
PMCID: PMC1079139
Genetics
A Method for Selection of Biochemical Mutants of Neurospora
Joseph Lein, Herschel K. Mitchell, and Mary B. Houlahan
Proc Natl Acad Sci U S A. 1948 September; 34(9): 435–442.
PMCID: PMC1079140
A Predictable Mutation in Bacteria
E. Ruth Witkus
Proc Natl Acad Sci U S A. 1948 September; 34(9): 442–443.
PMCID: PMC1079141
Mathematics
A Convexity Theorem
R. Salem and A. Zygmund
Proc Natl Acad Sci U S A. 1948 September; 34(9): 443–447.
PMCID: PMC1079142
Notes on Integration: II
M. H. Stone
Proc Natl Acad Sci U S A. 1948 September; 34(9): 447–455.
PMCID: PMC1079143
Physics
Some Preliminary Results on the Spectra of AsH3, AsD3 and PH3
Virginia Marie McConaghie and Harald H. Nielsen
Proc Natl Acad Sci U S A. 1948 September; 34(9): 455–464.
PMCID: PMC1079144
Journal Matter
Original table of contents page
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