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Volume 4(3);  March 1918
The cover of the journal
Astronomy
Dependence of the Spectral Relation of Double Stars Upon Distance
C. D. Perrine
Proc Natl Acad Sci U S A. 1918 March; 4(3): 71–74.
PMCID: PMC1091402
Hypothesis to Account for the Spectral Conditions of the Stars
C. D. Perrine
Proc Natl Acad Sci U S A. 1918 March; 4(3): 75.
PMCID: PMC1091403
Genetics
The Effect of Artificial Selection on Bristle Number in Drosophila ampelophila and its Interpretation
Fernandus Payne
Proc Natl Acad Sci U S A. 1918 March; 4(3): 55–58.
PMCID: PMC1091397
National Research Council
Meetings of the Executive Committee
Cary T. Hutchinson
Proc Natl Acad Sci U S A. 1918 March; 4(3): 76–84.
PMCID: PMC1091404
Physics
The Resolving Powers of X-Ray Spectrometers and the Tungsten X-Ray Spectrum
Elmer Dershem
Proc Natl Acad Sci U S A. 1918 March; 4(3): 62–65.
PMCID: PMC1091400
Note on Methods of Observing Potential Differences Induced by the Earth's Magnetic Field in an Insulated Moving Wire
Carl Barus and Maxwell Barus
Proc Natl Acad Sci U S A. 1918 March; 4(3): 66–70.
PMCID: PMC1091401
Zoology
The Reactions of the Melanophores of Amiurus to Light and to Adrenalin
A. W. L. Bray
Proc Natl Acad Sci U S A. 1918 March; 4(3): 58–60.
PMCID: PMC1091398
Further Experiments on the Sex of Parthenogenetic Frogs
Jacques Loeb
Proc Natl Acad Sci U S A. 1918 March; 4(3): 60–62.
PMCID: PMC1091399
Journal Matter
Original table of contents page
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