This journal provides immediate access to some articles. Volume 17(2); February 1931 Chemistry The Interpretation of the Thermal Decomposition of Nitrous Oxide PMCID: PMC1076003 Reversible Coagulation in Living Tissue: I PMCID: PMC1076004 Genetics The Independence of Dominant Spotting and Recessive Spotting (“Piebald”) in the House Mouse PMCID: PMC1076002 Geology and Paleontology The California Earthquakes of Nov. 28, 1929, and the Surface Layers of the Earth in California PMCID: PMC1076001 Mathematics On the Unified Field Theory: IV PMCID: PMC1076005 The Arithmetic of Polynomials in a Galois Field PMCID: PMC1076006 The Coloring of Graphs PMCID: PMC1076007 Non-Separable and Planar Graphs PMCID: PMC1076008 The Principle of Maupertuis PMCID: PMC1076009 Notes on Scalar Extensions of Tensors and Properties of Local Coordinates PMCID: PMC1076010 Physiology and Pathology On the Specific Dynamic Action of Protein PMCID: PMC1076000 Journal Matter Administrative content — journal masthead, notices, indexes, etc. | ||