pmc logo imageJournal ListSearchpmc logo image
Logo of pnasPNAS Home page.PNAS Editorial BoardPNAS AboutPNAS SubscriptionsPNAS Info for Authors
This journal provides immediate access to some articles.
Other Issues:  previous | next | latest | archive
Volume 24(7);  July 1938
The cover of the journal
Astronomy
A Metagalactic Density Gradient
Harlow Shapley
Proc Natl Acad Sci U S A. 1938 July; 24(7): 282–287.
PMCID: PMC1077094
Genetics
The Distribution of Gene Frequencies Under Irreversible Mutation
Sewall Wright
Proc Natl Acad Sci U S A. 1938 July; 24(7): 253–259.
PMCID: PMC1077089
Mathematics
Largest Degree of a Substitution in the Groups of a Given Degree
G. A. Miller
Proc Natl Acad Sci U S A. 1938 July; 24(7): 293–296.
PMCID: PMC1077096
Remarks on Riemann's Doctoral Dissertation
Jesse Douglas
Proc Natl Acad Sci U S A. 1938 July; 24(7): 297–302.
PMCID: PMC1077097
Paleontology
A Tarsiid Primate and a Mixodectid from the Poway Eocene, California
Chester Stock
Proc Natl Acad Sci U S A. 1938 July; 24(7): 288–293.
PMCID: PMC1077095
Physics
The Mechanism of Hearing as Revealed Through Experiment on the Masking Effect of Thermal Noise
Harvey Fletcher
Proc Natl Acad Sci U S A. 1938 July; 24(7): 265–274.
PMCID: PMC1077091
The Dimensionless Constants of Physics
Arthur E. Haas
Proc Natl Acad Sci U S A. 1938 July; 24(7): 274–276.
PMCID: PMC1077092
Physiology
Auxin in Isolated Roots Growing in Vitro
J. van Overbeek and James Bonner
Proc Natl Acad Sci U S A. 1938 July; 24(7): 260–264.
PMCID: PMC1077090
Psychology
On the Relative Contributions of Nature and Nurture to Average Group Differences in Intelligence
Barbara S. Burks
Proc Natl Acad Sci U S A. 1938 July; 24(7): 276–282.
PMCID: PMC1077093
Journal Matter
Original table of contents page
| PDF–37K |
Administrative content — journal masthead, notices, indexes, etc.
Other Issues:  previous | next | latest | archive
Articles from Proceedings of the National Academy of Sciences of the United States of America are provided here courtesy of
National Academy of Sciences