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Volume 33(12);  December 1947
The cover of the journal
Biochemistry
Studies on the Biochemistry of Tetrahymena: X. Quantitative Response to Essential Amino Acids
G. W. Kidder and Virginia Dewey
Proc Natl Acad Sci U S A. 1947 December; 33(12): 347–356.
PMCID: PMC1079074
Chemistry
Effect of Increasing Food Protein Upon the Calcium Content of the Body
H. C. Sherman, M. S. Ragan, and M. E. Bal
Proc Natl Acad Sci U S A. 1947 December; 33(12): 356–358.
PMCID: PMC1079075
Genetics
The Effects of Isolates on the Frequency of a Rare Human Gene
L. C. Dunn
Proc Natl Acad Sci U S A. 1947 December; 33(12): 359–363.
PMCID: PMC1079076
The Nature of Gene Action as Shown by Cell-Limited and Cell-Diffusible Gene Products
Donald F. Jones
Proc Natl Acad Sci U S A. 1947 December; 33(12): 363–365.
PMCID: PMC1079077
The Influence of X-Rays and Near Infra-Red Rays on Recessive Lethals in Drosophila Melanogaster
Berwind P. Kaufmann and Helen Gay
Proc Natl Acad Sci U S A. 1947 December; 33(12): 366–372.
PMCID: PMC1079078
Mathematics
On Infinite Complexes with Automorphisms
Beno Eckmann
Proc Natl Acad Sci U S A. 1947 December; 33(12): 372–376.
PMCID: PMC1079079
An Oscillation Theorem for Continuous Spectra
Philip Hartman and Aurel Wintner
Proc Natl Acad Sci U S A. 1947 December; 33(12): 376–379.
PMCID: PMC1079080
On the Composition of Quadratic Forms
H. C. Lee
Proc Natl Acad Sci U S A. 1947 December; 33(12): 379–381.
PMCID: PMC1079081
On the Problem of Similar Regions
E. L. Lehmann and H. Scheffé
Proc Natl Acad Sci U S A. 1947 December; 33(12): 382–386.
PMCID: PMC1079082
A Proof of Lower Semicontinuity
Everett Pitcher
Proc Natl Acad Sci U S A. 1947 December; 33(12): 386–392.
PMCID: PMC1079083
Journal Matter
Original table of contents page
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