This journal provides immediate access to some articles. Volume 37(7); July 1951 Astronomy On the Evolution of the Protoplanets PMCID: PMC1063382 Biochemistry The Chloride Transport System of the Gastric Mucosa PMCID: PMC1063383 A New Ribose Nucleoside from Neurospora: “Orotidine” PMCID: PMC1063384 Botany The Isolation and Culture of Gymnosporangium Juniperi-Virgininae Schw. Upon Artificial Media PMCID: PMC1063385 Genetics The Seration of Fourth Chromosome Loci in Drosophila Melanogaster PMCID: PMC1063386 A Map of the Fourth Chromosome of Drosophila Melanogaster, Based on Crossing Over in Triploid Females PMCID: PMC1063387 The Cytoplasmic Separation of Species PMCID: PMC1063388 Mathematics Effective Conformal Transformation of Smooth, Simply Connected Domains PMCID: PMC1063389 Partial Sums of Fourier Series PMCID: PMC1063390 The Mathematics of Second Quantization PMCID: PMC1063391 On a Conjecture of Murray and von Neumann PMCID: PMC1063392 On Determinants and a Property of the Trace in Finite Factors PMCID: PMC1063393 A Generalization of the Frobenius Reciprocity Theorem PMCID: PMC1063394 Heat Conduction on Riemannian Manifolds: II: Heat Distribution on Complexes and Approximation Theory PMCID: PMC1063395 A Generalization of Hermite's Law of Reciprocity PMCID: PMC1063396 The Dimensions of the Irreducible Representations of a Finite Group PMCID: PMC1063397 Approximations Exceeding 1300 Decimals for √3, 1/√3, Sin (π/3) and Distribution of Digits in Them PMCID: PMC1063398 Pathology The Relation of Adrenal Hormones to the Pathogenesis of Experimental Nephritis PMCID: PMC1063399 Physics On the Green's Functions of Quantized Fields: I PMCID: PMC1063400 On the Green's Functions of Quantized Fields: II PMCID: PMC1063401 Zoology Distribution of Mass in Salivary Gland Chromosomes PMCID: PMC1063402 Correction The Jacobson Radical of a Semiring PMCID: PMC1063403 Corrects: The Jacobson Radical of a Semiring. Proc Natl Acad Sci U S A. 1951 March; 37(3): 163–170. Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||