This journal provides immediate access to some articles. Volume 2(6); June 1916 Anthropology New Data on the Archaeology of Venezuela PMCID: PMC1091020 Astronomy The Pyranometer: An Instrument for Measuring Sky Radiation PMCID: PMC1091022 Chemistry Change of the Ionization of Salts in Alcoholic Solvents with the Concentration PMCID: PMC1091026 Genetics De Vriesian Mutation in the Garden Bean, Phaseolus Vulgaris PMCID: PMC1091017 Mathematics Differential Equations and Implicit Functions in Infinitely Many Variables PMCID: PMC1091015 Note on Lucas' Theorem PMCID: PMC1091023 A Variable System of Sevens on Two Twisted Cubic Curves PMCID: PMC1091024 Physics Note on the Phosphorescence of Uranyl Salts PMCID: PMC1091021 Physiology Studies of Ductless Glands by the Electrical Method PMCID: PMC1091018 Zoology The Sex of Parthenogenetic Frogs PMCID: PMC1091016 The Distribution of the Chondriosomes to the Spermatozoa in Scorpions PMCID: PMC1091019 The Neuromuscular Structure of Sea-Anemones PMCID: PMC1091025 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||