This journal provides immediate access to some articles. Volume 5(5); May 1919 Chemistry An Electromagnetic Hypothesis of the Kinetics of Heterogeneous Equilibrium, and of the Structure of Liquids PMCID: PMC1091558 Hydrogen Overvoltage PMCID: PMC1091559 Genetics Linear Arrangement of Genes and Double Crossing Over PMCID: PMC1091561 The Spatial Relations of Genes PMCID: PMC1091562 National Research Council Extract of Minutes of Joint Meeting of the Executive Board of the National Research Council with the Council of the National Academy of Sciences PMCID: PMC1091564 Minutes of Joint Meeting of the Executive Board and the Council of the National Academy of Sciences PMCID: PMC1091565 Physics Superposed or Duplicated Spectrum Fringes PMCID: PMC1091557 An Approximate Law of Energy Distribution in the General X-Ray Spectrum PMCID: PMC1091560 A Complete Apparatus for Absolute Acoustical Measurements PMCID: PMC1091563 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||