This journal provides immediate access to some articles. Volume 34(4); April 1948 Biochemistry The Protein of the Salivary Gland Secretion in Drosophila PMCID: PMC1062935 Genetics Linkage Studies of the Rat: IX. Cataract PMCID: PMC1062936 The Suppression of Crossing Over in Inversion Heterozygotes of Drosophila Pseudoobscura PMCID: PMC1062937 The Rôle of Mutation and of Selection in the Frequency of Mutants Among Microörganisms Grown on Irradiated Substrate PMCID: PMC1062938 Mathematics On the Average Value of Arithmetic Functions PMCID: PMC1062939 An Inversion and Representation Theory for Convolution Transforms with Totally Positive Kernels PMCID: PMC1062940 The Laplace Transform for Locally Compact Abelian Groups PMCID: PMC1062941 On the Asymptotic Distribution of the Sum of a Random Number of Random Variables PMCID: PMC1062942 On Variation-Diminishing Integral Operators of the Convolution Type PMCID: PMC1062943 Physics Physical Curves in Generalized Fields of Force PMCID: PMC1062944 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||