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Volume 13(2);  February 1927
The cover of the journal
Anthropology
Eskimos and Plants
A. V. Kidder
Proc Natl Acad Sci U S A. 1927 February; 13(2): 74–75.
PMCID: PMC1084837
Chemistry
The Thermal Decomposition of Ammonia upon the Surface of a Molybdenum Wire
Robert E. Burk
Proc Natl Acad Sci U S A. 1927 February; 13(2): 67–74.
PMCID: PMC1084836
Genetics
Chromosome and Gene Mutations in Datura Following Exposure to Radium Rays
C. Stuart Gager and A. F. Blakeslee
Proc Natl Acad Sci U S A. 1927 February; 13(2): 75–79.
PMCID: PMC1084838
The Chromosomal Constitution of Nubbin, a Compound (2n + 1) Type in Datura
Albert F. Blakeslee
Proc Natl Acad Sci U S A. 1927 February; 13(2): 79–85.
PMCID: PMC1084839
Mathematics
On the Closure of Certain Assemblages of Trigonometrical Functions
Norbert Wiener
Proc Natl Acad Sci U S A. 1927 February; 13(2): 27–29.
PMCID: PMC1084825
On a Type of Lorentz Transformations
G. Y. Rainich
Proc Natl Acad Sci U S A. 1927 February; 13(2): 29–31.
PMCID: PMC1084826
Cyclicly Connected Continuous Curves
Gordon T. Whyburn
Proc Natl Acad Sci U S A. 1927 February; 13(2): 31–38.
PMCID: PMC1084827
Displacements in a Geometry of Paths Which Carry Paths into Paths
L. P. Eisenhart and M. S. Knebelman
Proc Natl Acad Sci U S A. 1927 February; 13(2): 38–42.
PMCID: PMC1084828
Physics
Photo-Electric Emission, Thermionic Emission and Peltier Effect: (From the Point of View of Dual Electric Conduction)
Edwin H. Hall
Proc Natl Acad Sci U S A. 1927 February; 13(2): 43–46.
PMCID: PMC1084829
The Transverse Thermo-Electric Effect in Metal Crystals
P. W. Bridgman
Proc Natl Acad Sci U S A. 1927 February; 13(2): 46–50.
PMCID: PMC1084830
The Effect of Velocity Distribution on the Deflection of Atoms in an Inhomogenous Magnetic Field
Worth H. Rodebush
Proc Natl Acad Sci U S A. 1927 February; 13(2): 50–52.
PMCID: PMC1084831
Pinhole Probe Record of the Closed Organ Pipe
Carl Barus
Proc Natl Acad Sci U S A. 1927 February; 13(2): 52–56.
PMCID: PMC1084832
A Comparison of the Thermionic and Photoelectric Work Functions for Clean Tungsten
A. H. Warner
Proc Natl Acad Sci U S A. 1927 February; 13(2): 56–60.
PMCID: PMC1084833
The Quantization of the Rotational Motion of the Polyatomic Molecule by the New Wave Mechanics
Enos E. Witmer
Proc Natl Acad Sci U S A. 1927 February; 13(2): 60–65.
PMCID: PMC1084834
A Note on the Spectrum of Doubly Ionized Scandium
Stanley Smith
Proc Natl Acad Sci U S A. 1927 February; 13(2): 65–67.
PMCID: PMC1084835
Journal Matter
Original table of contents page
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