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Volume 2(9);  September 1916
The cover of the journal
Astronomy
The Rotation and Radial Velocity of the Spiral Nebula N. G. C. 4594
Francis G. Pease
Proc Natl Acad Sci U S A. 1916 September; 2(9): 517–521.
PMCID: PMC1091084
A Simple Method for Determining the Colors of the Stars
Frederick H. Seares
Proc Natl Acad Sci U S A. 1916 September; 2(9): 521–525.
PMCID: PMC1091085
Studies of Magnitudes in Star Clusters: III. The Colors of the Brighter Stars in Four Globular Systems
Harlow Shapley
Proc Natl Acad Sci U S A. 1916 September; 2(9): 525–528.
PMCID: PMC1091086
Mathematics
A Proof of White's Porism
A. B. Coble
Proc Natl Acad Sci U S A. 1916 September; 2(9): 530–531.
PMCID: PMC1091088
On Certain Asymptotic Expressions in the Theory of Linear Differential Equations
W. E. Milne
Proc Natl Acad Sci U S A. 1916 September; 2(9): 543–545.
PMCID: PMC1091092
On Newton's Method of Approximation
Henry B. Fine
Proc Natl Acad Sci U S A. 1916 September; 2(9): 546–552.
PMCID: PMC1091093
Petrology
A Contribution to the Petrography of the Philippine Islands
J. P. Iddings and E. W. Morley
Proc Natl Acad Sci U S A. 1916 September; 2(9): 531–533.
PMCID: PMC1091089
Physics
The Effect of an Electric Field on the Lines of Lithium and Calcium
Janet T. Howell
Proc Natl Acad Sci U S A. 1916 September; 2(9): 528–530.
PMCID: PMC1091087
Physiology
The Mechanism of Diffusion of Electrolytes Through Animal Membranes
Jacques Loeb
Proc Natl Acad Sci U S A. 1916 September; 2(9): 511–516.
PMCID: PMC1091083
Salt Antagonism in Gelatine
W. O. Fenn
Proc Natl Acad Sci U S A. 1916 September; 2(9): 534–538.
PMCID: PMC1091090
Similarity in the Behavior of Protoplasm and Gelatin
W. O. Fenn
Proc Natl Acad Sci U S A. 1916 September; 2(9): 539–543.
PMCID: PMC1091091
Journal Matter
Original table of contents page
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