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Volume 27(2);  February 15, 1941
Astronomy
Notes on Binary Stars: I. On the Surface Gravity of a Rotationally and Tidally Distorted Star
Theodore Eugene Sterne
Proc Natl Acad Sci U S A. 1941 February 15; 27(2): 93–99.
PMCID: PMC1078281
Notes on Binary Stars: II. On the Light of Eclipsing Binaries Out of Eclipse
Theodore Eugene Sterne
Proc Natl Acad Sci U S A. 1941 February 15; 27(2): 99–106.
PMCID: PMC1078282
Notes on Binary Stars: III. The Ellipticity Effect in Eccentric Eclipsing Binaries
Theodore Eugene Sterne
Proc Natl Acad Sci U S A. 1941 February 15; 27(2): 106–108.
PMCID: PMC1078283
Chemistry
Serological Reactions with Simple Substances Containing Two or More Haptenic Groups
Linus Pauling, Dan H. Campbell, and David Pressman
Proc Natl Acad Sci U S A. 1941 February 15; 27(2): 125–128.
PMCID: PMC1078287
Genetics
Bivalent Structure in the Fly, Melophagus Ovinus L. (Pupipara, Hippoboscidae)
Kenneth W. Cooper
Proc Natl Acad Sci U S A. 1941 February 15; 27(2): 109–114.
PMCID: PMC1078284
Some Effects of the Gene Wv(Dominant Spotting) in Mice
Elizabeth Fekete, C. C. Little, and A. M. Cloudman
Proc Natl Acad Sci U S A. 1941 February 15; 27(2): 114–117.
PMCID: PMC1078285
Mathematics
On Dirichlet's Divisor Plan
Aurel Wintner
Proc Natl Acad Sci U S A. 1941 February 15; 27(2): 135–137.
PMCID: PMC1078289
Uniqueness Theorems for Conformal Mapping of Multiply Connected Domains
M. Shiffman
Proc Natl Acad Sci U S A. 1941 February 15; 27(2): 137–139.
PMCID: PMC1078290
Pathology and Bacteriology
Progressive Immunization
Edwin B. Wilson and Jane Worcester
Proc Natl Acad Sci U S A. 1941 February 15; 27(2): 129–135.
PMCID: PMC1078288
Physics
Optically Reciprocal Gratings and Their Application to Synthesis of Fourier Series
M. J. Buerger
Proc Natl Acad Sci U S A. 1941 February 15; 27(2): 117–124.
PMCID: PMC1078286
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