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Volume 11(8);  August 1925
The cover of the journal
Biology
The Soil Population
Selman A. Waksman
Proc Natl Acad Sci U S A. 1925 August; 11(8): 476–481.
PMCID: PMC1086080
Chemistry
The Paramagnetism of “Odd Molecules”
Nelson W. Taylor and Gilbert N. Lewis
Proc Natl Acad Sci U S A. 1925 August; 11(8): 456–457.
PMCID: PMC1086076
The Activation of Hydrogén by Excited Mercury Atoms
Allan C. G. Mitchell
Proc Natl Acad Sci U S A. 1925 August; 11(8): 458–463.
PMCID: PMC1086077
What Is Humus?
Selman A. Waksman
Proc Natl Acad Sci U S A. 1925 August; 11(8): 463–468.
PMCID: PMC1086078
Mathematics
Concerning the Separation of Point Sets by Curves
R. L. Moore
Proc Natl Acad Sci U S A. 1925 August; 11(8): 469–476.
PMCID: PMC1086079
Physics
An Experimental Determination of the Critical Excitation Frequency for the Production of Fluorescent X-Radiation
Samuel K. Allison and William Duane
Proc Natl Acad Sci U S A. 1925 August; 11(8): 485–489.
PMCID: PMC1086083
The Calculation of the X-Ray Diffracting Power at Points in a Crystal
William Duane
Proc Natl Acad Sci U S A. 1925 August; 11(8): 489–493.
PMCID: PMC1086084
The Effect of Commutation of Impedances on the Acoustic Pressure Produced by Paired Telephonic Systems
Carl Barus
Proc Natl Acad Sci U S A. 1925 August; 11(8): 494–498.
PMCID: PMC1086085
A Statistical Quantum Theory of Regular Reflection and Refraction
R. T. Cox and J. C. Hubbard
Proc Natl Acad Sci U S A. 1925 August; 11(8): 498–502.
PMCID: PMC1086086
The Distribution of Diffracting Power in Sodium Chloride
R. J. Havighurst
Proc Natl Acad Sci U S A. 1925 August; 11(8): 502–507.
PMCID: PMC1086087
The Distribution of Diffracting Power in Certain Crystals
R. J. Havighurst
Proc Natl Acad Sci U S A. 1925 August; 11(8): 507–512.
PMCID: PMC1086088
Ionization Produced in Gaseous Reactions
A. Keith Brewer
Proc Natl Acad Sci U S A. 1925 August; 11(8): 512–514.
PMCID: PMC1086089
Ionization of Mercury Vapor by Ultra-Violet Light
G. F. Rouse and G. W. Giddings
Proc Natl Acad Sci U S A. 1925 August; 11(8): 514–517.
PMCID: PMC1086090
Modified and Unmodified Scattering Coefficients of X-Rays in Matter
O. K. DeFoe and G. E. M. Jauncey
Proc Natl Acad Sci U S A. 1925 August; 11(8): 517–520.
PMCID: PMC1086091
The Energy Reappearing as Characteristic X-Rays when X-Rays Are Absorbed in Copper
G. E. M. Jauncey and O. K. DeFoe
Proc Natl Acad Sci U S A. 1925 August; 11(8): 520–522.
PMCID: PMC1086092
Physiology
The Precipitin Reaction of Thyroglobulin: Specificness; Presence of Thyroglobulin in Human Thyroid Veins; Production by Rabbit of Precipitin for Rabbit Thyroglobulin; Thyroglobulin in the Foetal Thyroid and in Exophthalmic Goiter
Ludvig Hektoen and Kamil Schulhof
Proc Natl Acad Sci U S A. 1925 August; 11(8): 481–484.
PMCID: PMC1086081
The Internal Secretion of the Parathyroid Glands
J. B. Collip
Proc Natl Acad Sci U S A. 1925 August; 11(8): 484–485.
PMCID: PMC1086082
Statistics
The Logistic or Autocatalytic Grid
Edwin B. Wilson
Proc Natl Acad Sci U S A. 1925 August; 11(8): 451–456.
PMCID: PMC1086075
Journal Matter
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