This journal provides immediate access to some articles. Volume 5(12); December 1919 Chemistry The Change of Molecular Kinetic Energy into Molecular Potential Energy: The Entropy Principle and Molecular Association PMCID: PMC1091649 New Measurements of the Vapor Pressure of Mercury PMCID: PMC1091653 Cohesion, Internal Pressure, Adhesion, Tensile Strength, Tensile Energy, Negative Surface Energy, and Molecular Attraction PMCID: PMC1091654 The Adhesion Between Mercury, Water, and Organic Substances, and the Fundamental Principles of Flotation PMCID: PMC1091655 Metallic Salts of Pyrrol, Indol, and Carbazol PMCID: PMC1091657 Genetics A Benign Tumor that is Hereditary in Drosophila PMCID: PMC1091656 Mathematics Conditions Necessary and Sufficient for the Existence of a Stieltjes Integral PMCID: PMC1091651 Transformations of Cyclic Systems of Circles PMCID: PMC1091652 National Research Council Extracts from the Minutes of the Meeting of the Interim Committee PMCID: PMC1091662 Physics The Displacement of the Gravitating Needle in its Dependence on Atmospheric Temperatures PMCID: PMC1091650 Radiationless Orbits PMCID: PMC1091659 The Effect Upon the Atom of the Passage of an Alpha Ray Through It PMCID: PMC1091660 Physiology Growth and Reproduction in Fowls in the Absence of Carotinoids and the Physiological Relation of Yellow Pigmentation to Egg Laying PMCID: PMC1091658 Statistics On the Embryological Basis of Human Mortality PMCID: PMC1091661 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||