This journal provides immediate access to some articles. Volume 5(10); October 1919 Astronomy Some Problems of Sidereal Astronomy PMCID: PMC1091622 On the Spectral Lines of a Pulsating Star PMCID: PMC1091623 Studies of Magnitudes in Star Clusters: X. Spectral Type B and the Local Stellar System PMCID: PMC1091627 Chemistry Ethylene Chlorhydrin PMCID: PMC1091624 Studies of the Constitution of Steel PMCID: PMC1091625 Influence of Ions on the Electrification and Rate of Diffusion of Water Through Membranes PMCID: PMC1091628 Genetics Inheritance of Quantity and Quality of Milk Production in Dairy Cattle PMCID: PMC1091626 National Academy of Sciences Report of the Annual Meeting, 1919 PMCID: PMC1091631 Award of Medals PMCID: PMC1091632 Research Grants from Trust Funds of the Academy PMCID: PMC1091633 National Research Council Meeting of the Interim Committee PMCID: PMC1091629 Minutes of Joint Meeting of the Executive Board of The National Research Council with the Council of the National Academy of Sciences PMCID: PMC1091630 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||