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Volume 8(7);  July 1922
The cover of the journal
Astronomy
Invisible Sun-Spots
George E. Hale
Proc Natl Acad Sci U S A. 1922 July; 8(7): 168–170.
PMCID: PMC1085084
Comparison of Theory with Observation for the Minor Planets 10 Hygiea and 175 Andromache with Respect to Perturbations by Jupiter
A. O. Leuschner
Proc Natl Acad Sci U S A. 1922 July; 8(7): 170–173.
PMCID: PMC1085085
A Method of Deriving the Distance of the A-Type Stars
W. S. Adams and A. H. Joy
Proc Natl Acad Sci U S A. 1922 July; 8(7): 173–176.
PMCID: PMC1085086
The Larger Results of 20 Years of Solar Radiation Observations
C. G. Abbot, F. E. Fowle, and L. B. Aldrich
Proc Natl Acad Sci U S A. 1922 July; 8(7): 177–181.
PMCID: PMC1085087
Biology
On the Influence of Density of Population Upon the Rate of Reproduction in Drosophila
Raymond Pearl and Sylvia L. Parker
Proc Natl Acad Sci U S A. 1922 July; 8(7): 212–219.
PMCID: PMC1085096
Animal Evolution
Austin H. Clark
Proc Natl Acad Sci U S A. 1922 July; 8(7): 219–225.
PMCID: PMC1085097
The Correlation of Time Units and Climatic Changes in Peat Deposits of the United States and Europe
Alfred P. Dachnowski
Proc Natl Acad Sci U S A. 1922 July; 8(7): 225–231.
PMCID: PMC1085098
Chemistry
The Isolation of Pyrimidines from the Nucleic Acid of Tubercle Bacillus
Treat B. Johnson and Elmer B. Brown
Proc Natl Acad Sci U S A. 1922 July; 8(7): 187–188.
PMCID: PMC1085090
Mathematics
Normal Coördinates for the Geometry of Paths
O. Veblen
Proc Natl Acad Sci U S A. 1922 July; 8(7): 192–197.
PMCID: PMC1085092
Principal Directions in a Riemannian Space
J. L. Synge
Proc Natl Acad Sci U S A. 1922 July; 8(7): 198–203.
PMCID: PMC1085093
Principal Directions in the Einstein Solar Field
J. L. Synge
Proc Natl Acad Sci U S A. 1922 July; 8(7): 204–207.
PMCID: PMC1085094
Fields of Parallel Vectors in the Geometry of Paths
L. P. Eisenhart
Proc Natl Acad Sci U S A. 1922 July; 8(7): 207–212.
PMCID: PMC1085095
Pathology
Replantation of Entire Limbs without Suture of Vessels
William S. Halsted
Proc Natl Acad Sci U S A. 1922 July; 8(7): 181–186.
PMCID: PMC1085088
Physics
The Physical Examination of Hearing and Binaural Aids for the Deaf
R. L. Wegel
Proc Natl Acad Sci U S A. 1922 July; 8(7): 155–160.
PMCID: PMC1085080
The Production of an E. M. F. on Closed Circuit by a Light Effect on Argentite
H. Horton Sheldon and Paul H. Geiger
Proc Natl Acad Sci U S A. 1922 July; 8(7): 161–163.
PMCID: PMC1085081
Positive and Negative Pinhole Resonators
Carl Barus
Proc Natl Acad Sci U S A. 1922 July; 8(7): 163–165.
PMCID: PMC1085082
The Evaluation of Quantum Integrals
Paul S. Epstein
Proc Natl Acad Sci U S A. 1922 July; 8(7): 166–167.
PMCID: PMC1085083
The Spectral Energy Distribution and Opacity of Wire Explosion Vapors
J. A. Anderson
Proc Natl Acad Sci U S A. 1922 July; 8(7): 231–232.
PMCID: PMC1085099
Psychology
The Relative Sensitivity of the Ear at Different Levels of Loudness
Donald MacKenzie
Proc Natl Acad Sci U S A. 1922 July; 8(7): 188–191.
PMCID: PMC1085091
Zoölogy
Degeneration and Regeneration of the Lateral-line Organs in Amiurus Nebulosus
Mary H. Chambers
Proc Natl Acad Sci U S A. 1922 July; 8(7): 186–187.
PMCID: PMC1085089
Correction
Note on the Definition of a Lineal Functional
Proc Natl Acad Sci U S A. 1922 July; 8(7): 232.
PMCID: PMC1085100
Corrects: Charles Albert Fischer. Note on the Definition of a Lineal Functional. Proc Natl Acad Sci U S A. 1922 February; 8(2): 26–29.
Erratum
On the Distribution of the Velocities of Stars of Late Types of Spectrum
Proc Natl Acad Sci U S A. 1922 July; 8(7): 232.
PMCID: PMC1085101
Corrects: Gustaf Strömberg. On the Distribution of the Velocities of Stars of Late Types of Spectrum. Proc Natl Acad Sci U S A. 1922 June; 8(6): 141–146.
Journal Matter
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