This journal provides immediate access to some articles. Volume 3(2); February 1917 Astronomy Axes of Symmetry in Globular Clusters PMCID: PMC1091184 The Parallax of the Planetary Nebulae N. G. C. 7662 PMCID: PMC1091191 Biology Temperature Optima for Human Energy PMCID: PMC1091190 Geology Atlantis and the Permanency of the North Atlantic Ocean Bottom PMCID: PMC1091177 Mathematics Natural and Isogonal Families of Curves on a Surface PMCID: PMC1091180 Some Problems of Diophantine Approximation: The Series Σ e (λn) and the Distribution of the Points (λn α) PMCID: PMC1091181 A Note on the Fitting of Parabolas PMCID: PMC1091183 Petrology A Contribution to the Petrography of the Island of Bawéan, Netherlands Indies PMCID: PMC1091186 Physics On Moseley's Law for X-Ray Spectra PMCID: PMC1091182 Refractivity Determined Irrespective of Form, by Displacement Interferometry PMCID: PMC1091188 Zoology The Responses of Hydroids to Gravity PMCID: PMC1091178 The Lips and the Nasal Apertures in the Gnathostome Fishes, and Their Homologues in the Higher Vertebrates PMCID: PMC1091179 The Share of Egg and Sperm in Heredity PMCID: PMC1091185 The Phylogenetic Development of Subapterous and Apterous Castes in the Formicidae PMCID: PMC1091187 The Food of Drosophila Melanogaster Meigen PMCID: PMC1091189 Adult Hymenopterous Parasites Attached to the Body of Their Host PMCID: PMC1091192 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||