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Volume 24(2);  February 1938
The cover of the journal
Botany
A Cytological Study of Colchicine Effects in the Induction of Polyploidy in Plants
O. J. Eigsti
Proc Natl Acad Sci U S A. 1938 February; 24(2): 56–63.
PMCID: PMC1077028
Chemistry
Organisms Requiring Vitamin B1
William J. Robbins
Proc Natl Acad Sci U S A. 1938 February; 24(2): 53–56.
PMCID: PMC1077027
Genetics
Chromosome Numbers in Nodules and Roots of Red Clover, Common Vetch and Garden Pea
Louise Wipf and D. C. Cooper
Proc Natl Acad Sci U S A. 1938 February; 24(2): 87–91.
PMCID: PMC1077034
Geology
Chemical Stratification and Lake Morphology
G. Evelyn Hutchinson
Proc Natl Acad Sci U S A. 1938 February; 24(2): 63–69.
PMCID: PMC1077029
Mathematics
Groups Having a Maximum Set of Independent Generators of the Same Order
G. A. Miller
Proc Natl Acad Sci U S A. 1938 February; 24(2): 91–94.
PMCID: PMC1077035
Groups Having a Maximum Number Set of Conjugate Independent Generators
G. A. Miller
Proc Natl Acad Sci U S A. 1938 February; 24(2): 94–97.
PMCID: PMC1077036
The Existence of a Minimal Surface of Least Area Bounded by Prescribed Jordan Arcs and Prescribed Surfaces
R. Courant
Proc Natl Acad Sci U S A. 1938 February; 24(2): 97–101.
PMCID: PMC1077037
The Continuumproblem
Felix Bernstein
Proc Natl Acad Sci U S A. 1938 February; 24(2): 101–104.
PMCID: PMC1077038
On the Existence of a Closed Convex Surface Realizing a Given Riemannian Metric
Hans Lewy
Proc Natl Acad Sci U S A. 1938 February; 24(2): 104–106.
PMCID: PMC1077039
Physiology
Ascorbic Acid and the Growth of Plant Embryos
James Bonner and David Bonner
Proc Natl Acad Sci U S A. 1938 February; 24(2): 70–75.
PMCID: PMC1077030
Potentials in Halicystis as Affected by Non-Electrolytes
W. J. V. Osterhout
Proc Natl Acad Sci U S A. 1938 February; 24(2): 75–79.
PMCID: PMC1077031
A Comparison of the Diffusible Substances Concerned with Eye Color Development in Drosophila, Ephestia and Habrobracon
G. W. Beadle, R. L. Anderson, and Jane Maxwell
Proc Natl Acad Sci U S A. 1938 February; 24(2): 80–85.
PMCID: PMC1077032
The Effect of pH on the Development of Ultra-Centrifuged Fucus Eggs
D. M. Whitaker
Proc Natl Acad Sci U S A. 1938 February; 24(2): 85–87.
PMCID: PMC1077033
Journal Matter
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