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Volume 14(2);  February 1928
The cover of the journal
Chemistry
The Quantum Theory of Quasi-Unimolecular Gas Reactions
Oscar Knefler Rice
Proc Natl Acad Sci U S A. 1928 February; 14(2): 113–118.
PMCID: PMC1085388
The Theory of the Decomposition of Azomethane
Oscar Knefler Rice
Proc Natl Acad Sci U S A. 1928 February; 14(2): 118–124.
PMCID: PMC1085389
Fundamental Frequencies, Interatomic Forces and Molecular Properties
John R. Bates and Donald H. Andrews
Proc Natl Acad Sci U S A. 1928 February; 14(2): 124–130.
PMCID: PMC1085390
The Effect of Intensive Drying on the Vapor Pressure and Vapor Density of Ammonium Chloride
Worth H. Rodebush and John C. Michalek
Proc Natl Acad Sci U S A. 1928 February; 14(2): 131–132.
PMCID: PMC1085391
Genetics
Genetic Evidence of a Selective Segregation of Chromosomes in a Second Species of Sciara (Diptera)
Chas. W. Metz
Proc Natl Acad Sci U S A. 1928 February; 14(2): 140–141.
PMCID: PMC1085394
The “Outside-In” Oenothera Flower, a New Morphological Type Produced by the Interaction of Two Recessive Mendelian Factors
George H. Shull
Proc Natl Acad Sci U S A. 1928 February; 14(2): 142–146.
PMCID: PMC1085395
Linkage with Crossing-Over between Rubricalyx Buds and Old-Gold Flower Color in Oenothera
George H. Shull
Proc Natl Acad Sci U S A. 1928 February; 14(2): 147–149.
PMCID: PMC1085396
Mathematics
A New Proof of the Lefschetz Formula on Invariant Points
H. Hopf
Proc Natl Acad Sci U S A. 1928 February; 14(2): 149–153.
PMCID: PMC1085397
Note on Projective Coördinates
H. P. Robertson
Proc Natl Acad Sci U S A. 1928 February; 14(2): 153–154.
PMCID: PMC1085398
Projective Tensors and Connections
Oswald Veblen
Proc Natl Acad Sci U S A. 1928 February; 14(2): 154–166.
PMCID: PMC1085399
Physics
The Molecular Structures of Methane
Jared Kirtland Morse
Proc Natl Acad Sci U S A. 1928 February; 14(2): 166–171.
PMCID: PMC1085400
Additional Lines in the K Series of Molybdenum and the Natural Breadth of Spectral Lines
Bergen Davis and Harris Purks
Proc Natl Acad Sci U S A. 1928 February; 14(2): 172–178.
PMCID: PMC1085401
The Correspondence Principle in the Statistical Interpretation of Quantum Mechanics
J. H. Van Vleck
Proc Natl Acad Sci U S A. 1928 February; 14(2): 178–188.
PMCID: PMC1085402
Experiments with Modified Mucronate Electrodes
Carl Barus
Proc Natl Acad Sci U S A. 1928 February; 14(2): 188–191.
PMCID: PMC1085403
The Mobilities of Gaseous Ions in H2S-H2 Mixtures
Leonard B. Loeb and L. DuSault
Proc Natl Acad Sci U S A. 1928 February; 14(2): 192–199.
PMCID: PMC1085404
Statistics
Mendelian Inheritance with Assortive Mating
Edwin B. Wilson
Proc Natl Acad Sci U S A. 1928 February; 14(2): 137–140.
PMCID: PMC1085393
Zoölogy
Some Effects of Dietary Insufficiency in the Ciliate Didinium Nasutum
C. Dale Beers
Proc Natl Acad Sci U S A. 1928 February; 14(2): 132–137.
PMCID: PMC1085392
Journal Matter
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