This journal provides immediate access to some articles. Volume 37(1); January 1951 Astronomy On the Origin of the Solar System PMCID: PMC1063291 Proxima Centauri as a Flare Star PMCID: PMC1063292 The Theory of Micro-Meteorites: Part II. In Heterothermal Atmospheres PMCID: PMC1063293 Biochemistry Multimolecular Adsorption of Horse Heart Metmyoglobin Onto Films of Barium Stearate PMCID: PMC1063294 A Comparison of the Content of Desoxyribosenucleic Acid (DNA) in Isolated Animal Nuclei by Cytochemical and Chemical Methods PMCID: PMC1063295 Genetics Structures in E. Coli Resembling Chromonemata PMCID: PMC1063296 Mathematics Partial Differential Equations and Generalized Analytic Functions: Second Note PMCID: PMC1063297 The Harmonic Operator for Exterior Differential Forms PMCID: PMC1063298 On the Analysis of Representations of the Linear Group PMCID: PMC1063299 The Characters of the Symmetric Group PMCID: PMC1063300 Vector Fields on the n-Sphere PMCID: PMC1063301 Many-Figure Approximations to √2, and Distribution of Digits in √2 and 1/√2 PMCID: PMC1063302 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||