This journal provides immediate access to some articles. Volume 24(1); January 1938 Astronomy Asymmetry of Light Curves in the Great Sequence as a Function of Frequency of Period PMCID: PMC1077013 Note on the Stellar Distribution in the Vicinity of a Southern Galactic Window PMCID: PMC1077014 Mathematics Groups Having a Maximum Number Set of Independent Generators PMCID: PMC1077016 Special Homology Groups PMCID: PMC1077017 Log π and Other Basic Constants PMCID: PMC1077018 Einstein Spaces in a Space of Constant Curvature PMCID: PMC1077019 Classification of Element Transformations by Means of Isogonal and Equi-Tangential Series PMCID: PMC1077020 Abstract Self-Adjoint Boundary Conditions PMCID: PMC1077021 Physiology A Simplified Method for Auxin Extraction PMCID: PMC1077022 Light Intensity and the Nitrogen Hunger Period in the Manchu Soybean PMCID: PMC1077023 Zoölogy The Present State of Our Knowledge Concerning the Life Cycle of the Foraminifera PMCID: PMC1077015 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||