This journal provides immediate access to some articles. Volume 28(12); December 1942 Bacteriology Oxidized Cotton, an Immunologically Specific Polysaccharide PMCID: PMC1078530 Botany Sexual Hormones in Achlya: V. Hormone A′, a Male-Secreted Augmenter or Activator of Hormone A PMCID: PMC1078529 Chemistry The Lower Hydrates of Soap PMCID: PMC1078532 The Characteristics of Soap Hemihydrate Crystals PMCID: PMC1078533 Genetics The Genetic Nature of X-Ray Induced Changes in Pollen PMCID: PMC1078531 Mathematics Statistical Metrics PMCID: PMC1078534 Natural Isomorphisms in Group Theory PMCID: PMC1078535 Concerning Intersecting Continua PMCID: PMC1078536 Concerning a Continuum and Its Boundary PMCID: PMC1078537 Concerning Domains Whose Boundaries Are Compact PMCID: PMC1078538 On Sets of Integers Which Contain No Three Terms in Arithmetical Progression PMCID: PMC1078539 Some Advances in the Combinatory Theory of Quantification PMCID: PMC1078540 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||