This journal provides immediate access to some articles. Volume 23(8); August 1937 Astronomy A Survey of Thirty-Six Thousand Southern Galaxies PMCID: PMC1076961 Genetics Growth and Development of the Salivary Gland Chromosomes in Sciara PMCID: PMC1076955 Development of Eye Colors in Drosophila: Relation between Pigmentation and Release of the Diffusible Substances PMCID: PMC1076956 Autosomal Lethal Mutation Frequencies in Drosophila PMCID: PMC1076957 Haploid Ovarian Tissue in Drosophila PMCID: PMC1076958 Mathematics Note on Transitive Transformations PMCID: PMC1076959 Groups in Which Every Set of Independent Generators Is a Maximum Set PMCID: PMC1076960 Physiology and Biochemistry The Growth of Plant Embryos in Vitro. Preliminary Experiments on the Rôle of Accessory Substances PMCID: PMC1076962 The Eye-Stalk Hormone and Rate of Heart Beat in Crustaceans PMCID: PMC1076963 Zoölogy and Anatomy The Seminal Vesicles of the Goby, with Preliminary Chemical and Physiological Studies of the Vesicular Fluid PMCID: PMC1076964 Journal Matter Administrative content — journal masthead, notices, indexes, etc. | ||