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Volume 24(1);  January 1938
The cover of the journal
Astronomy
Asymmetry of Light Curves in the Great Sequence as a Function of Frequency of Period
Sergei Gaposchkin
Proc Natl Acad Sci U S A. 1938 January; 24(1): 1–4.
PMCID: PMC1077013
Note on the Stellar Distribution in the Vicinity of a Southern Galactic Window
Bart J. Bok and Eric M. Lindsay
Proc Natl Acad Sci U S A. 1938 January; 24(1): 4–9.
PMCID: PMC1077014
Mathematics
Groups Having a Maximum Number Set of Independent Generators
G. A. Miller
Proc Natl Acad Sci U S A. 1938 January; 24(1): 17–20.
PMCID: PMC1077016
Special Homology Groups
M. Richardson
Proc Natl Acad Sci U S A. 1938 January; 24(1): 21–23.
PMCID: PMC1077017
Log π and Other Basic Constants
Horace S. Uhler
Proc Natl Acad Sci U S A. 1938 January; 24(1): 23–30.
PMCID: PMC1077018
Einstein Spaces in a Space of Constant Curvature
Aaron Fialkow
Proc Natl Acad Sci U S A. 1938 January; 24(1): 30–34.
PMCID: PMC1077019
Classification of Element Transformations by Means of Isogonal and Equi-Tangential Series
Edward Kasner and John De Cicco
Proc Natl Acad Sci U S A. 1938 January; 24(1): 34–38.
PMCID: PMC1077020
Abstract Self-Adjoint Boundary Conditions
J. W. Calkin
Proc Natl Acad Sci U S A. 1938 January; 24(1): 38–42.
PMCID: PMC1077021
Physiology
A Simplified Method for Auxin Extraction
J. van Overbeek
Proc Natl Acad Sci U S A. 1938 January; 24(1): 42–46.
PMCID: PMC1077022
Light Intensity and the Nitrogen Hunger Period in the Manchu Soybean
E. B. Fred, P. W. Wilson, and Orville Wyss
Proc Natl Acad Sci U S A. 1938 January; 24(1): 46–52.
PMCID: PMC1077023
Zoölogy
The Present State of Our Knowledge Concerning the Life Cycle of the Foraminifera
Earl H. Myers
Proc Natl Acad Sci U S A. 1938 January; 24(1): 10–17.
PMCID: PMC1077015
Journal Matter
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