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Volume 30(9);  September 15, 1944
Astronomy
Note on the Discovery of Red Stars
Guillermo Haro
Proc Natl Acad Sci U S A. 1944 September 15; 30(9): 247–250.
PMCID: PMC1078705
Botany
Antibiotic Activity of Lichens
Paul R. Burkholder, Alexander W. Evans, Ilda McVeigh, and Helen K. Thornton
Proc Natl Acad Sci U S A. 1944 September 15; 30(9): 250–255.
PMCID: PMC1078706
Genetics
Genetic Linkage of Blood Types in the Rabbit
P. B. Sawin, M. A. Griffith, and C. A. Stuart
Proc Natl Acad Sci U S A. 1944 September 15; 30(9): 217–221.
PMCID: PMC1078699
Concerning Linkage of Waltzing in Rats
Maurice Whittinghill
Proc Natl Acad Sci U S A. 1944 September 15; 30(9): 221–226.
PMCID: PMC1078700
Linkage of Waltzing in the Rat
W. E. Castle
Proc Natl Acad Sci U S A. 1944 September 15; 30(9): 226–230.
PMCID: PMC1078701
X-Ray Inhibition of Mitosis in Relation to Chromosome Number
A. Marshak and Muriel Bradley
Proc Natl Acad Sci U S A. 1944 September 15; 30(9): 231–237.
PMCID: PMC1078702
Experiments on Sexual Isolation in Drosophila: I. Geographic Strains of Drosophila Willistoni
Th. Dobzhansky and Ernst Mayr
Proc Natl Acad Sci U S A. 1944 September 15; 30(9): 238–244.
PMCID: PMC1078703
Mathematics
Integral Formulas for the Characteristic Classes of Sphere Bundles
Shiing-shen Chern
Proc Natl Acad Sci U S A. 1944 September 15; 30(9): 269–273.
PMCID: PMC1078709
On Groups of Automorphism of Lie Groups
C. Chevalley
Proc Natl Acad Sci U S A. 1944 September 15; 30(9): 274–275.
PMCID: PMC1078710
Groups Containing Less Than Twenty-Eight Non-Invariant Operators
G. A. Miller
Proc Natl Acad Sci U S A. 1944 September 15; 30(9): 275–279.
PMCID: PMC1078711
A Group-Theoretic Characterization of the General Projective Collineation Group
N. S. Mendelsohn
Proc Natl Acad Sci U S A. 1944 September 15; 30(9): 279–283.
PMCID: PMC1078712
Pathology and Bacteriology
The Epidemic Curve with No Accession of Susceptibles
Edwin B. Wilson and Jane Worcester
Proc Natl Acad Sci U S A. 1944 September 15; 30(9): 264–269.
PMCID: PMC1078708
Physics
The Compressibility of Media under Extreme Pressures
F. D. Murnaghan
Proc Natl Acad Sci U S A. 1944 September 15; 30(9): 244–247.
PMCID: PMC1078704
Physiology and Biochemistry
Activity and Nutritional Deprivation
George Wald and Blanche Jackson
Proc Natl Acad Sci U S A. 1944 September 15; 30(9): 255–263.
PMCID: PMC1078707
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