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Volume 12(2);  February 1926
The cover of the journal
Agriculture
Some Relations of Environment to the Epidemiology and Control of Apple Scab
G. W. Keitt
Proc Natl Acad Sci U S A. 1926 February; 12(2): 68–74.
PMCID: PMC1084421
Astronomy
The Red Shift of Solar Lines and Relativity
Charles E. St. John
Proc Natl Acad Sci U S A. 1926 February; 12(2): 65–68.
PMCID: PMC1084420
Chemistry
Evidence for the Existence of Activated Molecules in a Chemical Reaction
Oliver R. Wulf
Proc Natl Acad Sci U S A. 1926 February; 12(2): 129–132.
PMCID: PMC1084433
Crystalline Insulin
John J. Abel
Proc Natl Acad Sci U S A. 1926 February; 12(2): 132–136.
PMCID: PMC1084434
Geology
Subsidence Rate of Reef-Encircled Islands
W. M. Davis
Proc Natl Acad Sci U S A. 1926 February; 12(2): 99–105.
PMCID: PMC1084427
Mathematics
Summary of Results and Proofs Concerning Fermat's Last Theorem
H. S. Vandiver
Proc Natl Acad Sci U S A. 1926 February; 12(2): 106–109.
PMCID: PMC1084428
Mass in Curved Space-Time
G. Y. Rainich
Proc Natl Acad Sci U S A. 1926 February; 12(2): 110–113.
PMCID: PMC1084429
Concerning Certain Solvable Equations with Functional Derivatives
Aristotle D. Michal
Proc Natl Acad Sci U S A. 1926 February; 12(2): 113–116.
PMCID: PMC1084430
First Integrals in the Geometry of Paths
Joseph Miller Thomas
Proc Natl Acad Sci U S A. 1926 February; 12(2): 117–124.
PMCID: PMC1084431
Einstein's Recent Theory of Gravitation and Electricity
Luther Pfahler Eisenhart
Proc Natl Acad Sci U S A. 1926 February; 12(2): 125–129.
PMCID: PMC1084432
Physics
Infra-Red Absorption of the N—H Bond
E. O. Salant
Proc Natl Acad Sci U S A. 1926 February; 12(2): 74–80.
PMCID: PMC1084422
A Possible Explanation of the Relativity Doublets and Anomalous Zeeman Effect by Means of a Magnetic Electron
F. R. Bichowsky and H. C. Urey
Proc Natl Acad Sci U S A. 1926 February; 12(2): 80–85.
PMCID: PMC1084423
Theory of the Specific Heat of Electrolytes
F. Zwicky
Proc Natl Acad Sci U S A. 1926 February; 12(2): 86–92.
PMCID: PMC1084424
The Spectrum of Neon in the Extreme Ultra-Violet
T. Lyman and F. A. Saunders
Proc Natl Acad Sci U S A. 1926 February; 12(2): 92–96.
PMCID: PMC1084425
The Free Path of Protons in Helium
Arthur J. Dempster
Proc Natl Acad Sci U S A. 1926 February; 12(2): 96–98.
PMCID: PMC1084426
Journal Matter
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