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Volume 20(10);  October 1934
The cover of the journal
Astronomy
On the Determination of the Geocentric Distance in the Laplace-Leuschner Direct Method for Parabolic Orbits
R. H. Sciobereti
Proc Natl Acad Sci U S A. 1934 October; 20(10)
PMCID: PMC1076477
Chemistry
The Rate and Extent of Anaerobic Decomposition of Sulfite Waste Liquor by Bacteria of Sea Water Mud
H. K. Benson and A. M. Partansky
Proc Natl Acad Sci U S A. 1934 October; 20(10): 542–551.
PMCID: PMC1076478
Mathematics
Note on the Location of the Critical Points of Harmonic Functions
J. L. Walsh
Proc Natl Acad Sci U S A. 1934 October; 20(10): 551–554.
PMCID: PMC1076479
Zoölogy and Anatomy
Correlation in Planarian Regeneration
E. D. Goldsmith
Proc Natl Acad Sci U S A. 1934 October; 20(10): 555–558.
PMCID: PMC1076480
Does “Protective Coloration” Protect?—Results of Some Experiments with Fishes and Birds
F. B. Sumner
Proc Natl Acad Sci U S A. 1934 October; 20(10): 559–564.
PMCID: PMC1076481
Journal Matter
Administrative content — journal masthead, notices, indexes, etc.
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