This journal provides immediate access to some articles. Volume 29(6); June 1943 Bacteriology Studies on the Methane Fermentation: VI. The Influence of Carbon Dioxide Concentration on the Rate of Carbon Dioxide Reduction by Molecular Hydrogen PMCID: PMC1078581 Botany Electrical Correlates of Pure and Hybrid Strains of Sweet Corn PMCID: PMC1078577 Synthesis of Riboflavin by a Yeast PMCID: PMC1078578 Pseudopyridoxine and Certain Fungi PMCID: PMC1078579 Genetics Effect of Colchicine Pretreatment on the Frequency of Chromosomal Aberrations Induced by X-Radiation PMCID: PMC1078582 Mathematics Some Topologically Invariant Metric Properties PMCID: PMC1078583 On a Statistical Generalization of Metric Spaces PMCID: PMC1078584 A Sufficient Condition That a C-Characteristic Be Geometric PMCID: PMC1078585 Zoölogy The Distribution of Phosphatase in the Spinal Cord of Chick Embryos of One to Eight Days' Incubation PMCID: PMC1078580 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||