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Volume 7(3);  March 1921
The cover of the journal
Anthropology
Peabody Museum Arizona Exploration, 1920
A. V. Kidder and S. J. Guernsey
Proc Natl Acad Sci U S A. 1921 March; 7(3): 69–71.
PMCID: PMC1084751
Chemistry
Studies on Catalysis: I. The Reduction of Uracil to Hydrouracil
Treat B. Johnson and Elmer B. Brown
Proc Natl Acad Sci U S A. 1921 March; 7(3): 75–77.
PMCID: PMC1084753
The Application of a Differential Thermometer in Ebullioscopy
Alan W. C. Menzies and Sydney L. Wright
Proc Natl Acad Sci U S A. 1921 March; 7(3): 77–80.
PMCID: PMC1084754
A Differential Thermometer
Alan W. C. Menzies
Proc Natl Acad Sci U S A. 1921 March; 7(3): 81–83.
PMCID: PMC1084755
Mathematics
Normalized Geometric Systems
Albert A. Bennett
Proc Natl Acad Sci U S A. 1921 March; 7(3): 84–89.
PMCID: PMC1084756
Problems of Potential Theory
Professor G. C. Evans
Proc Natl Acad Sci U S A. 1921 March; 7(3): 89–98.
PMCID: PMC1084757
Physics
The Open Mercury Manometer Read by Displacement Interferometry
Carl Barus
Proc Natl Acad Sci U S A. 1921 March; 7(3): 71–75.
PMCID: PMC1084752
Thermo-Electric Action and Thermal Conduction in Metals: A Summary
Edwin H. Hall
Proc Natl Acad Sci U S A. 1921 March; 7(3): 98–107.
PMCID: PMC1084758
Journal Matter
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