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Volume 20(7);  July 1934
The cover of the journal
Botany
A Preliminary Revision of the Perennial Species of Eriophyllum
Lincoln Constance
Proc Natl Acad Sci U S A. 1934 July; 20(7): 409–413.
PMCID: PMC1076432
Chemistry
Observations upon Growth from the Viewpoint of Statistical Interpretation
H. C. Sherman and H. L. Campbell
Proc Natl Acad Sci U S A. 1934 July; 20(7): 413–416.
PMCID: PMC1076433
A Spectrographic Study of the Occurrence of Chromium and Molybdenum in Carcinoma of the Human Breast
Andrew Dingwall and H. T. Beans
Proc Natl Acad Sci U S A. 1934 July; 20(7): 416–420.
PMCID: PMC1076434
Genetics
The Absence of Otonomy in the Development of the Effects of Certain Deficiencies in Drosophila melanogaster
Boris Ephrussi
Proc Natl Acad Sci U S A. 1934 July; 20(7): 420–422.
PMCID: PMC1076435
Geology and Paleontology
New Creodonta from the Sespe Upper Eocene, California
Chester Stock
Proc Natl Acad Sci U S A. 1934 July; 20(7): 423–427.
PMCID: PMC1076436
Mathematics
A Note on Cremonia Transformations
Gerald B. Huff
Proc Natl Acad Sci U S A. 1934 July; 20(7): 428–430.
PMCID: PMC1076437
Distinct Groups Whose Subgroups Are Simply Isomorphic
G. A. Miller
Proc Natl Acad Sci U S A. 1934 July; 20(7): 430–433.
PMCID: PMC1076438
Locally Compact Abelian Groups
Egbertus R. van Kampen
Proc Natl Acad Sci U S A. 1934 July; 20(7): 434–436.
PMCID: PMC1076439
Pathology and Bacteriology
On Photosynthesis and Free Nitrogen Assimilation by Leguminous Plants
E. B. Fred and P. W. Wilson
Proc Natl Acad Sci U S A. 1934 July; 20(7): 403–409.
PMCID: PMC1076431
Physics
Suggestions as to the Energy-Momentum Principle in a Non-Conservative Mechanics
Richard C. Tolman
Proc Natl Acad Sci U S A. 1934 July; 20(7): 437–439.
PMCID: PMC1332641
Suggestions as to Metric in a Non-Conservative Mechanics
Richard C. Tolman
Proc Natl Acad Sci U S A. 1934 July; 20(7): 439–444.
PMCID: PMC1076441
The Temperature-Structure-Composition Behavior of Certain Crystals
M. J. Buerger
Proc Natl Acad Sci U S A. 1934 July; 20(7): 444–453.
PMCID: PMC1076442
Physiology and Biochemistry
The Production of the Crustacean Chromatophore Activator
B. Kropp and W. J. Crozier
Proc Natl Acad Sci U S A. 1934 July; 20(7): 453–456.
PMCID: PMC1076443
Psychology and Anthropology
The Attributes of Tones
S. S. Stevens
Proc Natl Acad Sci U S A. 1934 July; 20(7): 457–459.
PMCID: PMC1076444
Journal Matter
Administrative content — journal masthead, notices, indexes, etc.
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