This journal provides immediate access to some articles. Volume 12(12); December 1926 Astronomy Some Applications of the Ionization Formula PMCID: PMC1084788 On the Spectra of Stars of Class c F8 PMCID: PMC1084789 The Apparition Dates of the Andromede (or Bielid) Meteor Swarms PMCID: PMC1084790 Chemistry Decomposition of Ammonia by Optically Excited Mercury Atoms PMCID: PMC1084782 The Concentration and Identification of the Element of Atomic Number 61 PMCID: PMC1084783 The Density of Oxygen and Its Compressibility below One Atmosphere: II PMCID: PMC1084784 The Density, Compressibility and Atomic Weight of Nitrogen PMCID: PMC1084785 The Synthesis and Disintegration of Atoms as Revealed by the Photography of Wilson Cloud Tracks PMCID: PMC1084786 Photosensitized Decompositions by Excited Mercury Atoms PMCID: PMC1084787 Genetics Miniature-α—A Second Frequently Mutating Character in Drosophila Virilis PMCID: PMC1084780 Genetic Evidence of a Selective Segregation of Chromosomes in Sciara (Diptera) PMCID: PMC1084781 Mathematics Transformations of Manifolds with a Boundary PMCID: PMC1084792 A Possible Way to Discuss the Fundamental Principles of Relativity PMCID: PMC1084793 Concerning Paths That Do Not Separate a Given Continuous Curve PMCID: PMC1084794 On Simply Transitive Primitive Groups PMCID: PMC1084795 Quadractic Forms Which Represent All Integers PMCID: PMC1084796 Congruences of Parallelism of a Field of Vectors PMCID: PMC1084797 Concerning Certain Types of Continuous Curves PMCID: PMC1084798 Summary of Results and Proofs Concerning Fermat's Last Theorem (Second Note) PMCID: PMC1084799 Physics Maxwell's Equations and Atomic Dynamics PMCID: PMC1084772 The Spectrum of Krypton in the Extreme Ultra-Violet PMCID: PMC1084773 Some Thermionic Experiments with a New Source of Positive PMCID: PMC1084774 The Dielectric Constant and Diamagnetism of Hydrogen and Helium in the New Quantum Mechanics PMCID: PMC1084775 On the Equilibrium between Radiation and Matter PMCID: PMC1084776 Extension of Doublet Laws in the First Long Period to chromium and Manganese PMCID: PMC1084777 Ionic Mobilities in Ammonia-Hydrogen Mixtures and an Anomalous Effect of Ammonia PMCID: PMC1084778 Note on the Correspondence Principle in the New Quantum Theory PMCID: PMC1084779 Zoölogy Larval Stages in a Protozoon PMCID: PMC1084791 Corrections Inhibition of Regeneration in Two-Headed or Two-Tailed Planarians PMCID: PMC1084800 Corrects: Inhibition of Regeneration in Two-Headed or Two-Tailed Planarians. Proc Natl Acad Sci U S A. 1926 September; 12(9): 570–574. The Goodness of Fit of Regression Formulae and the Distribution of Regression Coefficients PMCID: PMC1084801 Corrects: Identification of a cDNA encoding a parathyroid hormone-like peptide from a human tumor associated with humoral hypercalcemia of malignancy. Proc Natl Acad Sci U S A. 1988 January; 85(2): 597–601. Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||