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Volume 9(8);  August 1923
The cover of the journal
Biology
The Root System of Epigaea Repens and its Relation to the Fungi of the Humus
W. T. Councilman
Proc Natl Acad Sci U S A. 1923 August; 9(8): 279–285.
PMCID: PMC1085380
Geology
The Marginal Belts of the Coral Seas
W. M. Davis
Proc Natl Acad Sci U S A. 1923 August; 9(8): 292–296.
PMCID: PMC1085383
The Depth of Coral-Reef Lagoons
W. M. Davis
Proc Natl Acad Sci U S A. 1923 August; 9(8): 296–301.
PMCID: PMC1085384
Mathematics
The Einstein Equations of the Gravitational Field for an Arbitrary Distribution of Matter
Tracy Yerkes Thomas
Proc Natl Acad Sci U S A. 1923 August; 9(8): 275–278.
PMCID: PMC1085379
Physics
The Vibration of Air in Tubes Capped at Both Ends
Carl Barus
Proc Natl Acad Sci U S A. 1923 August; 9(8): 263–265.
PMCID: PMC1085376
The Vibration of the Air Filament in Quill Tubes Capped at Both Ends
Carl Barus
Proc Natl Acad Sci U S A. 1923 August; 9(8): 266–268.
PMCID: PMC1085377
Motion of an Electric Particle in a Riemann Space
Arthur Bramley
Proc Natl Acad Sci U S A. 1923 August; 9(8): 289–291.
PMCID: PMC1085382
Physiology
Correlation between Physical and Medical Findings on Normal Ears
John P. Minton and J. Gordon Wilson
Proc Natl Acad Sci U S A. 1923 August; 9(8): 269–274.
PMCID: PMC1085378
Zoölogy
The Symmetry of the Internal Ears in Flatfishes
J. V. Leech
Proc Natl Acad Sci U S A. 1923 August; 9(8): 286–288.
PMCID: PMC1085381
Journal Matter
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