This journal provides immediate access to some articles. Volume 28(1); January 1942 Anthropology Prehistoric Contact between South America and the West Indies PMCID: PMC1078393 Botany Guanine and Factor Z1, Growth Substances for Phycomyces PMCID: PMC1078394 Chemistry Radioactive Carbon as an Indicator of Carbon Dioxide Utilization: VIII. The Rôle of Carbon Dioxide in Cellular Metabolism PMCID: PMC1078395 Mathematics Representation of Measurable Flows in Euclidean 3-Space PMCID: PMC1078396 Inversion of a Generalized Laplace Integral PMCID: PMC1078397 On Formal Exponential Differentiation in Rings PMCID: PMC1078398 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||