This journal provides immediate access to some articles. Volume 36(4); April 1950 Biochemistry Metabolic Exchange of Carbon Dioxide with Carboxyls and Oxidative Synthesis of C4 Dicarboxylic Acids PMCID: PMC1063170 Botany Observations on the Effects of Maleic Hydrazide on Flowering of Tobacco, Maize and Cocklebur PMCID: PMC1063171 Genetics Repeated Mutations in One Area of a Mouse Chromosome PMCID: PMC1063172 Specificity of Interaction Between Identical Molecules PMCID: PMC1063173 Inheritance of Sexuality in Chlamydomonas Reinhardi PMCID: PMC1063174 Mathematics The Homology Structure of Sphere Bundles PMCID: PMC1063175 Elimination of Randomization in Certain Problems of Statistics and of the Theory of Games PMCID: PMC1063176 On Multiplicative Properties of a Generalized Jacobi-Cauchy Cyclotomic Sum PMCID: PMC1063177 The Solution of a Certain General Type of Integral Equation PMCID: PMC1063178 National Academy of Sciences Minutes of the Meeting for Organization, April, 1863 PMCID: PMC1063181 Zoology Extraction of a Mating Reaction Inhibiting Agent from Paramecium Calkinsi PMCID: PMC1063179 On the Rate of Passive Sinking of Daphnia PMCID: PMC1063180 Correction Absolute and Unconditional Convergence in Normed Linear Spaces PMCID: PMC1063182 Corrects: Absolute and Unconditional Convergence in Normed Linear Spaces. Proc Natl Acad Sci U S A. 1950 March; 36(3): 192–197. Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||