This journal provides immediate access to some articles. Volume 36(2); February 1950 Astronomy A Note on the Mean Square Velocity in Stellar Statistics PMCID: PMC1063137 Radial Oscillations of Compressible Gas Spheres PMCID: PMC1063138 Biochemistry The Synthesis of Rhodopsin from Retinene1 PMCID: PMC1063139 The Synthesis of Rhodopsin from Vitamin A1 PMCID: PMC1063140 Botany Antibiotic Substances from Basidiomycetes: VI. Agrocybe Dura PMCID: PMC1063141 Chemistry Quantitative Effects of Protein Enrichment of Diet upon Growth and Early Adult Life PMCID: PMC1063142 Engineering Distribution of Pressure on Curved Profiles in Supersonic Gas Flow with Variable Entropy PMCID: PMC1063143 Genetics The Selective Advantage of an Adenineless Double Mutant Over One of the Single Mutants Involved PMCID: PMC1063144 Mathematics Partial Differential Equations and Generalized Analytic Functions PMCID: PMC1063147 The Exceptional Simple Lie Algebras F4 and E6 PMCID: PMC1063148 A Topologized Fundamental Group PMCID: PMC1063149 On a Generalization of a Jacobi Exponential Sum Associated with Cyclotomy PMCID: PMC1063150 On Distortion at the Boundary of a Conformal Map PMCID: PMC1063151 Physics Higher Properties of Physical Systems of Curves PMCID: PMC1063145 Psychology Theoretical Relationships Among Some Measures of Conditioning PMCID: PMC1063146 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||