This journal provides immediate access to some articles. Volume 13(12); December 1927 Astronomy A Note on the Triple System, λ Tauri PMCID: PMC1085257 Biology The Penetration of Methylene Blue into Living Cells PMCID: PMC1085254 Chemistry The Thermal and Photochemical Decomposition of Azo Compounds and the Problem of Reaction Rates PMCID: PMC1085261 Mathematics The Residual Set of a Complex on a Manifold and Related Questions (Second Note) PMCID: PMC1085250 Power Series Expansions in the Neighborhood of a Point on a Surface PMCID: PMC1085251 The Analysis and Analysis Situs of Regular n-Spreads in (n + r)-Space PMCID: PMC1085252 Physics X-Ray Diffraction in Liquids: Saturated Normal Fatty Acids. Isomers of Primary Normal Alcohols and Normal Paraffins PMCID: PMC1085245 The Structure and Dimensions of the Benzene Ring PMCID: PMC1085246 The Space Group of Potassium, Rubidium and Caesium Sulphates PMCID: PMC1085247 The Diamagnetic Susceptibility of Hydrogen Molecule and of Helium in the New Quantum Mechanics PMCID: PMC1085248 On the Quantum Theory of the Polarization of Impact Radiation PMCID: PMC1085249 Physiology Quantitative Aspects of Tonic Immobility in Vertebrates PMCID: PMC1085258 Psychology Sensori-Motor Consequences of Passive Rotary and Rectilinear Oscillation of the Body PMCID: PMC1085259 Foster Parent-Foster Child Comparisons as Evidence upon the Nature-Nurture Problem PMCID: PMC1085260 Statistics On Certain Properties of Frequency Distributions of the Powers and Roots of the Variates of a Given Distribution PMCID: PMC1085253 Zoölogy Studies on the Effect of Potassium Alum-Hydrochloric Acid Solutions on the Growth and Fate of Neoplastic Tissue: II. Result Obtained on a Rapidly Growing Transplantable Sarcoma of the Mouse PMCID: PMC1085255 The Influence of a Power Dam in Modifying Conditions Affecting the Migration of the Salmon PMCID: PMC1085256 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||