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This journal provides immediate access to some articles. Volume 20(3); March 1934 Botany A Diploid Female Gametophyte of Sphaerocarpos PMCID: PMC1076364 Chemistry The Ultra-Violet Absorption Spectrum of Carbon Suboxide Gas PMCID: PMC1076369 Genetics Coincidence and Interference in Drosophila melanogaster PMCID: PMC1076366 The Rôle of the “Chromosome Sheath” in Mitosis, and Its Possible Relation to Phenomena of Mutation PMCID: PMC1076367 Development of the Embryo Sac of Lilium Henryi PMCID: PMC1076368 Geology and Paleontology A Second Eocene Primate from California PMCID: PMC1076365 Mathematics Boolean Algebras and Their Application to Topology PMCID: PMC1076376 Groups Whose Squares Constitute Cyclic Subgroups PMCID: PMC1076377 Average Distribution of Arbitrary Masses under Group Translations PMCID: PMC1076378 Entire Functions and Borel's Directions PMCID: PMC1076379 The Reduction of Degenerate Quadratic Differential Forms PMCID: PMC1076380 Physics Effect of Inhomogeneity on Cosmological Models PMCID: PMC1076370 Elastic Wave Analogies to the Motion of Electrons in Force Fields PMCID: PMC1076371 Physiology and Biochemistry A Theory of Protein Metabolism in Man PMCID: PMC1076372 On the Motion of Growth: VIII. The Connection between Growth and Heat Production in the Amphibian, Bufo vulgaris, from Fertilization to Metamorphosis PMCID: PMC1076373 Psychology and Anthropology The Resolution of Four Tests PMCID: PMC1076374 On Resolution into Generals and Specifics PMCID: PMC1076375 Zoölogy and Anatomy Survival of Young Rabbit Embryos on Artificial Media PMCID: PMC1076363 Erratum Possible Cytoplasmic as Well as Chromosomal Control of Sex in Haploid Males PMCID: PMC1076381 Corrects: Possible Cytoplasmic as Well as Chromosomal Control of Sex in Haploid Males. Proc Natl Acad Sci U S A. 1934 February; 20(2): 101–102. Journal Matter Administrative content — journal masthead, notices, indexes, etc. | ||
