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Volume 25(8);  August 1939
The cover of the journal
Astronomy
Galactic and Extragalactic Studies: I. On the Corona of Stars Around the Galactic System
Harlow Shapley
Proc Natl Acad Sci U S A. 1939 August; 25(8): 423–428.
PMCID: PMC1077935
Chemistry
Responses to Different Levels of Nutritional Intake of Riboflavin (Formerly Called Vitamin G)
H. C. Sherman and L. N. Ellis
Proc Natl Acad Sci U S A. 1939 August; 25(8): 420–422.
PMCID: PMC1077934
Genetics
The Effect of Temperature on X-Ray Induced Chromosome Aberrations
Karl Sax and E. V. Enzmann
Proc Natl Acad Sci U S A. 1939 August; 25(8): 397–405.
PMCID: PMC1077931
The Behavior in Successive Nuclear Divisions of a Chromosome Broken at Meiosis
Barbara McClintock
Proc Natl Acad Sci U S A. 1939 August; 25(8): 405–416.
PMCID: PMC1077932
The Influence of Transplantation upon Immunological Properties of Leukemic Cells
E. C. MacDowell, J. S. Potter, and M. J. Taylor
Proc Natl Acad Sci U S A. 1939 August; 25(8): 416–420.
PMCID: PMC1077933
Mathematics
Critical Points of a Map to a Circle
Everett Pitcher
Proc Natl Acad Sci U S A. 1939 August; 25(8): 428–431.
PMCID: PMC1077936
Groups Containing a Prime Number of Non-Invariant Subgroups
G. A. Miller
Proc Natl Acad Sci U S A. 1939 August; 25(8): 431–434.
PMCID: PMC1077937
Identification of Two Subsets
Everett Pitcher
Proc Natl Acad Sci U S A. 1939 August; 25(8): 435–438.
PMCID: PMC1077938
The Weak Topologies of Banach Spaces
A. E. Taylor
Proc Natl Acad Sci U S A. 1939 August; 25(8): 438–440.
PMCID: PMC1077939
Abstract Flat Projective Geometry
A. D. Michal and A. B. Mewborn
Proc Natl Acad Sci U S A. 1939 August; 25(8): 440–443.
PMCID: PMC1077940
Journal Matter
Administrative content — journal masthead, notices, indexes, etc.
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