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Volume 19(3);  March 1933
The cover of the journal
Astronomy
The Space Motions of Stars in the Orion and Scorpio-Centaurus Clusters
Freeman Devold Miller
Proc Natl Acad Sci U S A. 1933 March; 19(3): 277–286.
PMCID: PMC1085963
The Penetration of Iron Meteorites into the Ground
Willard J. Fisher
Proc Natl Acad Sci U S A. 1933 March; 19(3): 286–291.
PMCID: PMC1085964
Chemistry
Trimethyl Gallium, Trimethyl Gallium Etherate and Trimethyl Gallium Ammine
Charles A. Kraus and Frank E. Toonder
Proc Natl Acad Sci U S A. 1933 March; 19(3): 292–298.
PMCID: PMC1085965
Chlorination Products of Trimethyl Gallium
Charles A. Kraus and Frank E. Toonder
Proc Natl Acad Sci U S A. 1933 March; 19(3): 298–303.
PMCID: PMC1085966
The Three-Electron Bond in Chlorine Dioxide
L. O. Brockway
Proc Natl Acad Sci U S A. 1933 March; 19(3): 303–307.
PMCID: PMC1085967
The Neutron, Atom Building and a Nuclear Exclusion Principle
William Draper Harkins
Proc Natl Acad Sci U S A. 1933 March; 19(3): 307–318.
PMCID: PMC1085968
Mathematics
Groups in Which Either All the Operators or All the Subgroups of the Same Order Are Conjugate
G. A. Miller
Proc Natl Acad Sci U S A. 1933 March; 19(3): 332–335.
PMCID: PMC1085974
An Extremely Simple Method of Periodogram Analysis
Dinsmore Alter
Proc Natl Acad Sci U S A. 1933 March; 19(3): 335–339.
PMCID: PMC1085975
Some Remarks Concerning Schrödinger's Wave Equation
George D. Birkhoff
Proc Natl Acad Sci U S A. 1933 March; 19(3): 339–344.
PMCID: PMC1085976
On the Measure of the Non-Special Geodesics on a Surface of Constant Negative Curvature
Gustav A. Hedlund
Proc Natl Acad Sci U S A. 1933 March; 19(3): 345–348.
PMCID: PMC1085977
Pathology
Biological Significance of Protective Mechanisms Inherent in the Myocardium
Carl V. Weller
Proc Natl Acad Sci U S A. 1933 March; 19(3): 318–320.
PMCID: PMC1085969
Symposium on Climatic Cycles
I. Introductory Remarks
John C. Merriam
Proc Natl Acad Sci U S A. 1933 March; 19(3): 349–350.
PMCID: PMC1085978
II. Evidences of Cycles in Tree Ring Records
A. E. Douglass
Proc Natl Acad Sci U S A. 1933 March; 19(3): 350–360.
PMCID: PMC1085979
III. Periodicity in Solar Variation
C. G. Abbot and Mrs. A. M. Bond
Proc Natl Acad Sci U S A. 1933 March; 19(3): 361–370.
PMCID: PMC1085980
IV. The Nature of the Solar Cycle
W. S. Adams and S. B. Nicholson
Proc Natl Acad Sci U S A. 1933 March; 19(3): 371–375.
PMCID: PMC1085981
V. Correlation of Sedimentary and Climatic Records
Isaiah Bowman
Proc Natl Acad Sci U S A. 1933 March; 19(3): 376–388.
PMCID: PMC1085982
Zoölogy
Metachronism in Ciliated Epithelium
Leonard G. Worley
Proc Natl Acad Sci U S A. 1933 March; 19(3): 320–322.
PMCID: PMC1085970
The Intracellular Fibre Systems of Paramecium
Leonard G. Worley
Proc Natl Acad Sci U S A. 1933 March; 19(3): 323–326.
PMCID: PMC1085971
The Controlling Mechanism of Chromatophores in Palaemonetes
F. A. Brown, Jr.
Proc Natl Acad Sci U S A. 1933 March; 19(3): 327–329.
PMCID: PMC1085972
Degeneration of Melanophores in Fundulus
J. M. Odiorne
Proc Natl Acad Sci U S A. 1933 March; 19(3): 329–332.
PMCID: PMC1085973
Journal Matter
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