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This journal provides immediate access to some articles. Volume 14(7); July 1928 Anthropology A Stratification of Remains at an Early Maya Site PMCID: PMC1085598 Biochemistry The Interrelation between Diatoms, Their Chemical Environment, and Upwelling Water in the Sea, Off the Coast of Southern California PMCID: PMC1085600 Chemistry The Degree of Association of Sodium Vapor PMCID: PMC1085599 Mathematics Transformation of Conjugate Elements or of Conjugate Subgroups PMCID: PMC1085601 Paleontology Algal Deposits of Unkar Proterozoic Age in the Grand Canyon, Arizona PMCID: PMC1085618 Pathology Observations upon Complement Fixation in Infections with Endamoeba Histolytica PMCID: PMC1085602 Physics The Polarization of Characteristic Radiation PMCID: PMC1085605 The Repulsion between Electric Currents and Their Induced Eddy Currents in Parallel PMCID: PMC1085606 Apparent Evidence of Polarization in a Beam of β-Rays PMCID: PMC1085607 The Spectrum and State of Polarization of Fluorescent X-Rays PMCID: PMC1085608 An Interpretation of Dirac's Theory of the Electron PMCID: PMC1085609 Regularities Exhibited between Certain Multiplets for Elements in the Second Long Period PMCID: PMC1085610 Angular Scattering of Electrons in Hydrogen and Helium PMCID: PMC1085611 Thermodynamics Based on Statistics: I PMCID: PMC1085612 Thermodynamics Based on Statistics: II PMCID: PMC1085613 A Proposed Experiment on the Nature of Light PMCID: PMC1085614 The Spectrum of X-Rays from the Back of a Tungsten Target PMCID: PMC1085615 Absolute X-Ray Wave-Length Measurements PMCID: PMC1085616 On the Thermodynamic Equilibrium in the Universe PMCID: PMC1085617 Physiology Reversible Crystallization in Tendons and Its Functional Significance PMCID: PMC1085603 An Interpretation of Excitation, Exhaustion and Death in Terms of Physical Constants PMCID: PMC1085604 Correction On Some Properties of One-Valued Transformations of Manifolds PMCID: PMC1085619 Corrects: On Some Properties of One-Valued Transformations of Manifolds. Proc Natl Acad Sci U S A. 1928 March; 14(3): 206–214. Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||
