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Volume 6(10);  October 1920
The cover of the journal
Chemistry
The Ionization of Strong Electrolytes
William D. Harkins
Proc Natl Acad Sci U S A. 1920 October; 6(10): 601–605.
PMCID: PMC1084639
Geophysics
Present Status of Geodesy and Some of the Problems of This Branch of Geophysics
William Bowie
Proc Natl Acad Sci U S A. 1920 October; 6(10): 545–555.
PMCID: PMC1084632
The Problems of Seismology
Harry Fielding Reid
Proc Natl Acad Sci U S A. 1920 October; 6(10): 555–561.
PMCID: PMC1084633
The Status and Problems of Meteorology
C. F. Marvin
Proc Natl Acad Sci U S A. 1920 October; 6(10): 561–572.
PMCID: PMC1084634
Some of the Chief Problems in Terrestrial Magnetism and Electricity
Louis A. Bauer
Proc Natl Acad Sci U S A. 1920 October; 6(10): 572–580.
PMCID: PMC1084635
The Problems and Functions of the Section of Physical Oceanography of the American Geophysical Union
G. W. Littlehales
Proc Natl Acad Sci U S A. 1920 October; 6(10): 580–583.
PMCID: PMC1084636
The Problems of Volcanology
Henry S. Washington
Proc Natl Acad Sci U S A. 1920 October; 6(10): 583–592.
PMCID: PMC1084637
An Outline of Geophysical-Chemical Problems
Robert B. Sosman
Proc Natl Acad Sci U S A. 1920 October; 6(10): 592–601.
PMCID: PMC1084638
Mathematics
Motion on a Surface for any Positional Field of Force
Joseph Lipka
Proc Natl Acad Sci U S A. 1920 October; 6(10): 621–624.
PMCID: PMC1084643
Physics
On a Condition for Helmholtz's Equation Similar to Lame's
Arthur Gordon Webster
Proc Natl Acad Sci U S A. 1920 October; 6(10): 605–607.
PMCID: PMC1084640
The Absorption of X-Rays by Chemical Elements of High Atomic Numbers
William Duane, Hugo Fricke, and Wilhelm Stenström
Proc Natl Acad Sci U S A. 1920 October; 6(10): 607–612.
PMCID: PMC1084641
The Thomson Effect and Thermal Conduction in Metals
Edwin H. Hall
Proc Natl Acad Sci U S A. 1920 October; 6(10): 613–621.
PMCID: PMC1084642
Journal Matter
Original table of contents page
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