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Volume 13(5);  May 1927
The cover of the journal
Anthropology
A Stratigraphic Study in the Gila-Salt Region, Arizona
Erich F. Schmidt
Proc Natl Acad Sci U S A. 1927 May; 13(5): 291–298.
PMCID: PMC1084966
Chemistry
A Quantitative Treatment of Deviations from Raoult's Law
Joel H. Hildebrand
Proc Natl Acad Sci U S A. 1927 May; 13(5): 267–272.
PMCID: PMC1084959
The Thermal Decomposition of Ozone
Oliver R. Wulf and Richard C. Tolman
Proc Natl Acad Sci U S A. 1927 May; 13(5): 272–275.
PMCID: PMC1084960
Mathematics
Concerning Points of a Continuous Curve That Are Not Accessible from Each Other
C. M. Cleveland
Proc Natl Acad Sci U S A. 1927 May; 13(5): 275–276.
PMCID: PMC1084961
Recent Progress of Investigations by Symbolical Methods of the Invariants of Bi-Ternary Quantics
O. E. Glenn
Proc Natl Acad Sci U S A. 1927 May; 13(5): 276–280.
PMCID: PMC1084962
A Dynamical Theory of Economic Equilibrium
C. F. Roos
Proc Natl Acad Sci U S A. 1927 May; 13(5): 280–285.
PMCID: PMC1084963
On the Foundations of the Theory of Discontinuous Groups of Linear Transformations
Lester R. Ford
Proc Natl Acad Sci U S A. 1927 May; 13(5): 286–289.
PMCID: PMC1084964
On the Formation of Groups of Linear Transformations by Combination
Lester R. Ford
Proc Natl Acad Sci U S A. 1927 May; 13(5): 289–291.
PMCID: PMC1084965
Physics
The Infra-Red Absorption Spectra of Acetylene (C2H4), Ethylene (C2H4) and Ethane (C2H6)
Charles F. Meyer and Aaron A. Levin
Proc Natl Acad Sci U S A. 1927 May; 13(5): 298–302.
PMCID: PMC1084967
The Spectrum of CO2
G. W. Fox, O. S. Duffendack, and E. F. Barker
Proc Natl Acad Sci U S A. 1927 May; 13(5): 302–307.
PMCID: PMC1084968
The Entropy of Radiation
Gilbert N. Lewis
Proc Natl Acad Sci U S A. 1927 May; 13(5): 307–313.
PMCID: PMC1084969
Linear Elements of the Electromagnetic Pinhole Graphs
Carl Barus
Proc Natl Acad Sci U S A. 1927 May; 13(5): 313–315.
PMCID: PMC1084970
Thermionic Emission and the “Universal Constant” A
Edwin H. Hall
Proc Natl Acad Sci U S A. 1927 May; 13(5): 315–326.
PMCID: PMC1084971
Lagrangian Functions and Schrödinger's Rule
H. Bateman
Proc Natl Acad Sci U S A. 1927 May; 13(5): 326–330.
PMCID: PMC1084972
Two Remarks on the Wave-Theory of Mechanics
F. D. Murnaghan and K. F. Herzfeld
Proc Natl Acad Sci U S A. 1927 May; 13(5): 330–336.
PMCID: PMC1084973
Heats of Condensation of Positive Ions and the Mechanism of the Mercury Arc
K. T. Compton and C. C. Van Voorhis
Proc Natl Acad Sci U S A. 1927 May; 13(5): 336–341.
PMCID: PMC1084974
Series Spectra of Silver-Lake Atoms
R. J. Lang
Proc Natl Acad Sci U S A. 1927 May; 13(5): 341–346.
PMCID: PMC1084975
Term-Structure and Zeeman Effect of the Arc Spectrum of Tin: (Preliminary Report)
J. B. Green and R. A. Loring
Proc Natl Acad Sci U S A. 1927 May; 13(5): 347–350.
PMCID: PMC1084976
Journal Matter
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