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Volume 9(3);  March 1923
The cover of the journal
Bacteriology
The Mechanism of Selective Bacteriostasis
John W. Churchman
Proc Natl Acad Sci U S A. 1923 March; 9(3): 78–81.
PMCID: PMC1085270
Botany
A Note on the Statistics of Cyclic Growth
H. S. Reed
Proc Natl Acad Sci U S A. 1923 March; 9(3): 65–67.
PMCID: PMC1085265
Chemistry
Compressibility, Internal Pressure and Atomic Magnitudes
Theodore W. Richards
Proc Natl Acad Sci U S A. 1923 March; 9(3): 73–74.
PMCID: PMC1085268
The Separation of Isotopes
James Kendall and E. D. Crittenden
Proc Natl Acad Sci U S A. 1923 March; 9(3): 75–78.
PMCID: PMC1085269
An Investigation of the Chemical Nature of Two Typical Enzymes: Pancreatic and Malt Amylases
H. C. Sherman
Proc Natl Acad Sci U S A. 1923 March; 9(3): 81–86.
PMCID: PMC1085271
Mathematics
Continuous Transformations of Manifolds
Solomon Lefschetz
Proc Natl Acad Sci U S A. 1923 March; 9(3): 90–93.
PMCID: PMC1085273
A Lemma on Systems of Knotted Curves
J. W. Alexander
Proc Natl Acad Sci U S A. 1923 March; 9(3): 93–95.
PMCID: PMC1085274
Physics
Stokes' Law of Fall Completely Corrected
R. A. Millikan
Proc Natl Acad Sci U S A. 1923 March; 9(3): 67–70.
PMCID: PMC1085266
Gaseous Viscosity Measured by the Interferometer U-Tube
Carl Barus
Proc Natl Acad Sci U S A. 1923 March; 9(3): 71–72.
PMCID: PMC1085267
Statistics
Note on the Relative Abundance of the Elements in the Earth's Crust
Alfred J. Lotka
Proc Natl Acad Sci U S A. 1923 March; 9(3): 87–90.
PMCID: PMC1085272
Zoölogy
The Nerve Net in the Earthworm: Preliminary Report
W. M. Smallwood
Proc Natl Acad Sci U S A. 1923 March; 9(3): 95–100.
PMCID: PMC1085275
Journal Matter
Original table of contents page
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