This journal provides immediate access to some articles. Volume 5(1); January 1919 Chemistry The Inorganic Constituents of Lobster Shells PMCID: PMC1091513 The Ternary System CaO-MgO-SiO2 PMCID: PMC1091515 Genetics Quantitative Relations Between Chromatin and Cytoplasm in the Genus Arcella, with their Relations to External Characters PMCID: PMC1091516 Mathematics A Theorem on Power Series, with an Application to Conformal Mapping PMCID: PMC1091517 Paleontology On Some Fundamentals of Pre-Cambrian Paleo-Geography PMCID: PMC1091512 Zoology Flagellate Affinities of Trichonympha PMCID: PMC1091514 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||