This journal provides immediate access to some articles. Volume 28(9); September 1942 Astronomy On the Physical Characteristics of the Perseus Cluster of Nebulae PMCID: PMC1078490 Botany A Pyrimidine Analog of Thiamine and the Growth of Fungi PMCID: PMC1078489 Mathematics Automorphisms of the Dihedral Groups PMCID: PMC1078492 Some Asymptotic Relations PMCID: PMC1078493 An Orthogonal Property of the Hypergeometric Polynomial PMCID: PMC1078494 Contingency Tables PMCID: PMC1078495 The Association of Three Attributes PMCID: PMC1078496 Pathology The Epidemic Curve PMCID: PMC1078491 Zoölogy Oxidation-Reduction Patterns in Amphibian and Teleost Development PMCID: PMC1078487 Nucleoproteins of Cell Nuclei PMCID: PMC1078488 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||