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Volume 13(6);  June 1927
The cover of the journal
Astronomy
Ultra-Violet Solar Radiation
Edison Pettit
Proc Natl Acad Sci U S A. 1927 June; 13(6): 380–387.
PMCID: PMC1085021
On the Distance of the Sun from the Galactic Plane
B. P. Gerasimovič and W. J. Luyten
Proc Natl Acad Sci U S A. 1927 June; 13(6): 387–390.
PMCID: PMC1085022
The Relationship of Spectral Type to Period among Variable Stars
Walter S. Adams and Alfred H. Joy
Proc Natl Acad Sci U S A. 1927 June; 13(6): 391–393.
PMCID: PMC1085023
High Dispersion Stellar Spectra and Some Results of a Study of γ Cygni
Walter S. Adams and Alfred H. Joy
Proc Natl Acad Sci U S A. 1927 June; 13(6): 393–396.
PMCID: PMC1085024
Botany
Hermaphroditism in a Dioicous Hepatic
A. M. Showalter
Proc Natl Acad Sci U S A. 1927 June; 13(6): 369–372.
PMCID: PMC1085016
Chemistry
Magnetic Hydrogen Atoms and Non-Magnetic Molecules
William Albert Noyes
Proc Natl Acad Sci U S A. 1927 June; 13(6): 377–378.
PMCID: PMC1085019
The Relation of the Octet of Electrons to Ionization
William Albert Noyes
Proc Natl Acad Sci U S A. 1927 June; 13(6): 379–380.
PMCID: PMC1085020
Engineering
Mineralogical Content of Maine Sands in Relation to Mortar Strength
H. Walter Leavitt and John W. Gowen
Proc Natl Acad Sci U S A. 1927 June; 13(6): 351–354.
PMCID: PMC1085013
Mathematics
Groups of Collineations in a Space of Paths
M. S. Knebelman
Proc Natl Acad Sci U S A. 1927 June; 13(6): 396–400.
PMCID: PMC1085025
Physics
Remarks on the Quantum Theory of Diffraction
P. Ehrenfest and P. S. Epstein
Proc Natl Acad Sci U S A. 1927 June; 13(6): 400–408.
PMCID: PMC1085026
Absolute Intensities in the Hydrogen-Chloride Rotation Spectrum
Richard M. Badger
Proc Natl Acad Sci U S A. 1927 June; 13(6): 408–413.
PMCID: PMC1085027
Note on “Pendulum” Orbits in Atomic Models
R. B. Lindsay
Proc Natl Acad Sci U S A. 1927 June; 13(6): 413–419.
PMCID: PMC1085028
Measurement of the Mo.K Doublet Distances by Means of the Double X-Ray Spectrometer
Bergen Davis and Harris Purks
Proc Natl Acad Sci U S A. 1927 June; 13(6): 419–422.
PMCID: PMC1085029
The Structure of the Helium Atom: I
J. C. Slater
Proc Natl Acad Sci U S A. 1927 June; 13(6): 423–430.
PMCID: PMC1085030
The Zeeman Effect of the Hyper-Fine Structure Components of λ 2537 of Mercury
Walter A. MacNair
Proc Natl Acad Sci U S A. 1927 June; 13(6): 430–432.
PMCID: PMC1085031
The Dielectric Constant of Atomic Hydrogen in Undulatory Mechanics
Paul S. Epstein
Proc Natl Acad Sci U S A. 1927 June; 13(6): 432–438.
PMCID: PMC1085032
The Dielectric Constant of Atomic Hydrogen from the Point of View of Bohr's Quantum Theory
Evelyn F. Aylesworth
Proc Natl Acad Sci U S A. 1927 June; 13(6): 438–445.
PMCID: PMC1085033
Direct and Indirect Production of Characteristic X-Rays
David L. Webster
Proc Natl Acad Sci U S A. 1927 June; 13(6): 445–456.
PMCID: PMC1085034
Mucronate Electrode with Micrometer
Carl Barus
Proc Natl Acad Sci U S A. 1927 June; 13(6): 457–460.
PMCID: PMC1085035
The Reflection of Electrons from Crystals
Carl Eckart
Proc Natl Acad Sci U S A. 1927 June; 13(6): 460–462.
PMCID: PMC1085036
Coupling of Electronic and Nuclear Motions in Diatomic Molecules
Edward Uhler Condon
Proc Natl Acad Sci U S A. 1927 June; 13(6): 462–466.
PMCID: PMC1085037
Wave Mechanics and the Normal State of the Hydrogen Molecule
Edward Uhler Condon
Proc Natl Acad Sci U S A. 1927 June; 13(6): 466–470.
PMCID: PMC1085038
A New Equation for the Distribution of Radiant Energy
Gilbert N. Lewis
Proc Natl Acad Sci U S A. 1927 June; 13(6): 471–476.
PMCID: PMC1085039
The Hydrogen Atom with a Spinning Electron in Wave Mechanics
C. F. Richter
Proc Natl Acad Sci U S A. 1927 June; 13(6): 476–479.
PMCID: PMC1085040
Physiology
On the Mechanics of Blood Flow, with Special Reference to the Influence of Change of Posture
Dickinson W. Richards, Jr.
Proc Natl Acad Sci U S A. 1927 June; 13(6): 354–364.
PMCID: PMC1085014
The Nature of the Insensible Perspiration
Francis G. Benedict and Cornelia Golay Benedict
Proc Natl Acad Sci U S A. 1927 June; 13(6): 364–369.
PMCID: PMC1085015
Zoölogy
Modifications of Nerve Centers Due to the Transplantation of the Eye and Olfactory Organ in Anuran Embryos
Raoul M. May
Proc Natl Acad Sci U S A. 1927 June; 13(6): 372–374.
PMCID: PMC1085017
On the Growth, Care and Behavior of Loggerhead Turtles in Captivity
Samuel F. Hildebrand and Charles Hatsel
Proc Natl Acad Sci U S A. 1927 June; 13(6): 374–377.
PMCID: PMC1085018
Journal Matter
Original table of contents page
Administrative content — journal masthead, notices, indexes, etc.
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