This journal provides immediate access to some articles. Volume 3(1); January 1917 Astronomy Studies of the Magnitudes in Star Clusters: IV. On the Color of Stars in the Galactic Clouds Surrounding Messier II PMCID: PMC1091165 The Color of the Standard Polor Stars Determined by the Method of Exposure-Ratios PMCID: PMC1091166 Relation of the Apex of Solar Motion to Proper Motion and on the Cause of the Differences of its Position From Radial Velocities and Proper Motions PMCID: PMC1091168 The Meteor System of Pons-Winnecke's Comet PMCID: PMC1091170 Biology Application of the Laws of Action, Reaction and Interaction in Life Evolution PMCID: PMC1091159 Chemistry Improvements in Calorimetric Combustion, and the Heat of Combustion of Toluene PMCID: PMC1091171 Engineering Hydrology of the Isthmus of Panama PMCID: PMC1091169 Geology Physiographic Subdivision of the United States PMCID: PMC1091163 Terracing of Bajada Belts PMCID: PMC1091167 Physics Inferences Concerning Auroras PMCID: PMC1091158 The Resistance of Metals Under Pressure PMCID: PMC1091160 The Mass of the Electric Carrier in Copper, Silver and Aluminium PMCID: PMC1091172 The Silver Voltameter as an International Standard for the Measurement of Electric Current PMCID: PMC1091173 Physiology The Rate of Discharge of Central Neurones PMCID: PMC1091161 A Physiological Study of Noctiluca, With Special Reference to Light Production, Anaesthesia and Specific Gravity PMCID: PMC1091162 On the Composition of the Medusa, Cassiopea Xamachana and the Changes in it After Starvation PMCID: PMC1091164 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||