This journal provides immediate access to some articles. Volume 37(12); December 1951 Biochemistry A Third Abnormal Hemoglobin Associated with Hereditary Hemolytic Anemia PMCID: PMC1063470 Genetics Spontaneous and Ultra-Violet-Induced Mutations to Phage Resistance in Escherichia Coli PMCID: PMC1063471 Experiments on Sexual Isolation in Drosophila: X. Reproductive Isolation Between Drosophila Pseudoobscura and Drosophila Persimilis Under Natural and Under Laboratory Conditions PMCID: PMC1063472 The Induction of Activated, Stable States in the Chromosomes of Tradescantia by Infra-red and X-Rays PMCID: PMC1063473 The Interaction of a Minute Mutation with a Sex-linked Lethal of Drosophila Melanogaster PMCID: PMC1063474 Mathematics Theta Relations with Spherical Harmonics PMCID: PMC1063475 On Finite Groups with Two Independent Generators: IV. Conjugate Substitutions PMCID: PMC1063476 Plancherel Formula for Complex Semisimple Lie Groups PMCID: PMC1063477 Alternative Division Rings of Characteristic 2 PMCID: PMC1063478 Note on Approximation by Bounded Analytic Functions PMCID: PMC1063479 On a Theorem of Hardy, Littlewood, Polya, and Blackwell PMCID: PMC1063480 Radiation Capacity PMCID: PMC1063481 Physics Electron-Neutron Interaction PMCID: PMC1063482 Finding the Signs of the F's from the Shifted Patterson Product PMCID: PMC1063483 The Optical Theory of Willard Gibbs PMCID: PMC1063484 Physiology Oxidative and Phosphorylative Activity of Plant Mitochondria PMCID: PMC1063485 Zoology Hybridization and Embryonic Temperature Adaptation Studies of Rana Temporaria and Rana Sylvatica PMCID: PMC1063486 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||