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Volume 5(12);  December 1919
Chemistry
The Change of Molecular Kinetic Energy into Molecular Potential Energy: The Entropy Principle and Molecular Association
William D. Harkins
Proc Natl Acad Sci U S A. 1919 December; 5(12): 539–546.
PMCID: PMC1091649
New Measurements of the Vapor Pressure of Mercury
Alan W. C. Menzies
Proc Natl Acad Sci U S A. 1919 December; 5(12): 558–562.
PMCID: PMC1091653
Cohesion, Internal Pressure, Adhesion, Tensile Strength, Tensile Energy, Negative Surface Energy, and Molecular Attraction
William D. Harkins
Proc Natl Acad Sci U S A. 1919 December; 5(12): 562–568.
PMCID: PMC1091654
The Adhesion Between Mercury, Water, and Organic Substances, and the Fundamental Principles of Flotation
William D. Harkins
Proc Natl Acad Sci U S A. 1919 December; 5(12): 569–573.
PMCID: PMC1091655
Metallic Salts of Pyrrol, Indol, and Carbazol
Edward C. Franklin
Proc Natl Acad Sci U S A. 1919 December; 5(12): 580–582.
PMCID: PMC1091657
Genetics
A Benign Tumor that is Hereditary in Drosophila
Mary B. Stark
Proc Natl Acad Sci U S A. 1919 December; 5(12): 573–580.
PMCID: PMC1091656
Mathematics
Conditions Necessary and Sufficient for the Existence of a Stieltjes Integral
R. D. Carmichael
Proc Natl Acad Sci U S A. 1919 December; 5(12): 551–555.
PMCID: PMC1091651
Transformations of Cyclic Systems of Circles
L. P. Eisenhart
Proc Natl Acad Sci U S A. 1919 December; 5(12): 555–557.
PMCID: PMC1091652
National Research Council
Extracts from the Minutes of the Meeting of the Interim Committee
Proc Natl Acad Sci U S A. 1919 December; 5(12): 599–608.
PMCID: PMC1091662
Physics
The Displacement of the Gravitating Needle in its Dependence on Atmospheric Temperatures
Carl Barus
Proc Natl Acad Sci U S A. 1919 December; 5(12): 547–550.
PMCID: PMC1091650
Radiationless Orbits
Edwin Bidwell Wilson
Proc Natl Acad Sci U S A. 1919 December; 5(12): 588–591.
PMCID: PMC1091659
The Effect Upon the Atom of the Passage of an Alpha Ray Through It
R. A. Millikan, V. H. Gottschalk, and M. J. Kelly
Proc Natl Acad Sci U S A. 1919 December; 5(12): 591–592.
PMCID: PMC1091660
Physiology
Growth and Reproduction in Fowls in the Absence of Carotinoids and the Physiological Relation of Yellow Pigmentation to Egg Laying
Leroy S. Palmer
Proc Natl Acad Sci U S A. 1919 December; 5(12): 582–587.
PMCID: PMC1091658
Statistics
On the Embryological Basis of Human Mortality
Raymond Pearl
Proc Natl Acad Sci U S A. 1919 December; 5(12): 593–598.
PMCID: PMC1091661
Journal Matter
Original table of contents page
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