This journal provides immediate access to some articles. Volume 14(1); January 1928 Astronomy On Methods and Applications in Spectrophotometry PMCID: PMC1085354 Biology The Growth of Seedlings of the Canteloup, Cucumis Melo, in the Absence of Exogenous Food and Light PMCID: PMC1085335 Botany The Chromosomes of Pellia Neesiana PMCID: PMC1085348 Chemistry The Density, Compressibility and Atomic Weight of Neon PMCID: PMC1085346 The Density, Compressibility and Atomic Weight of Argon PMCID: PMC1085347 Genetics The Production of Variation in Nicotiana Species by X-Ray Treatment of Sex Cells PMCID: PMC1085349 Genetic Effects of X-Rays in Maize PMCID: PMC1085350 General Theory of Polygenic or Non-Monogenic Functions: The Derivative Congruence of Circles PMCID: PMC1085351 Geology Some Factors in Rock Metamorphism PMCID: PMC1085336 Late Tertiary Thrust Faults in the Mojave Desert, California PMCID: PMC1085337 Mathematics Number of Systems of Imprimitivity of Transitive Substitution Groups PMCID: PMC1085352 Concerning Triods in the Plane and the Junction Points of Plane Continua PMCID: PMC1085353 Physics The Quantum Levels and Resulting Constants of the Hydrogen Molecule PMCID: PMC1085338 The Scattering of X-Rays from Gases PMCID: PMC1085339 The Distribution of Energy in Molecules PMCID: PMC1085340 The Life of Atomic States and the Intensity of Spectral Lines PMCID: PMC1085341 THE SPECTRA OF SINGLY AND DOUBLY IONIZED GERMANIUM (GE II AND III) PMCID: PMC1085342 The Structure and Dimensions of the Ethane Molecule PMCID: PMC1085343 The Lattice Structure of Ethane PMCID: PMC1085344 Relations of Field-Currents to Thermionic-Currents PMCID: PMC1085345 The Photochemical Union of Hydrogen and Chlorine PMCID: PMC1085357 Physiology The Effect of Posture upon the Composition and Volume of the Blood in Man PMCID: PMC1085355 Statistics Sterility in American Marriages PMCID: PMC1085356 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||