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Volume 21(4);  April 1935
The cover of the journal
Botany
New Varieties of Western Willows
Carleton R. Ball
Proc Natl Acad Sci U S A. 1935 April; 21(4): 181–186.
PMCID: PMC1076561
Chemistry
The Oxygen Equilibrium of Hemoglobin and Its Structural Interpretation
Linus Pauling
Proc Natl Acad Sci U S A. 1935 April; 21(4): 186–191.
PMCID: PMC1076562
The Rate and Extent of Anaerobic Decomposition of Sulfite Waste Liquor by Bacteria of Sea Bottom Mud: II. Bacteriological
B. S. Henry and A. M. Partansky
Proc Natl Acad Sci U S A. 1935 April; 21(4): 191–200.
PMCID: PMC1076563
Genetics
Identification of the Salivary Gland Chromosomes in Drosophila Pseudoobscura
C. C. Tan
Proc Natl Acad Sci U S A. 1935 April; 21(4): 200–202.
PMCID: PMC1076564
The Behavior of Unstable Genic Loci—An Hypothesis
Curt Stern
Proc Natl Acad Sci U S A. 1935 April; 21(4): 202–208.
PMCID: PMC1076565
Pollen-Tube Growth of a Translocation of the 1·2 Chromosome in Datura
J. T. Buchholz, A. F. Blakeslee, and A. G. Avery
Proc Natl Acad Sci U S A. 1935 April; 21(4): 208–213.
PMCID: PMC1076566
Geology and Paleontology
Insectivora from the Sespe Uppermost Eocene, California
Chester Stock
Proc Natl Acad Sci U S A. 1935 April; 21(4): 214–219.
PMCID: PMC1076567
Mathematics
Application of Chain-Deformations to Critical Points and Extremals
S. Lefschetz
Proc Natl Acad Sci U S A. 1935 April; 21(4): 220–222.
PMCID: PMC1076568
Note on Pontrjagin's Topological Theorem of Duality
J. W. Alexander
Proc Natl Acad Sci U S A. 1935 April; 21(4): 222–225.
PMCID: PMC1076569
Connections between Differential Geometry and Topology
Sumner Byron Myers
Proc Natl Acad Sci U S A. 1935 April; 21(4): 225–227.
PMCID: PMC1076570
Physiology and Biochemistry
The Sensitive-Volume of the Meiotic Chromonemata of Gasteria as Determined by Irradiation with X-Rays
A. G. Marshak
Proc Natl Acad Sci U S A. 1935 April; 21(4): 227–232.
PMCID: PMC1076571
Zoölogy and Anatomy
Movement of Sensory Hairs in the Ear
R. E. Bowen
Proc Natl Acad Sci U S A. 1935 April; 21(4): 233–234.
PMCID: PMC1076572
Journal Matter
Administrative content — journal masthead, notices, indexes, etc.
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