This journal provides immediate access to some articles. Volume 20(11); November 1934 Astronomy The Accuracy of Least Squares PMCID: PMC1076484 Mathematics Ideals in Algebraic Rings PMCID: PMC1076485 V3 IN R6 OF [1,2]a PMCID: PMC1076486 The Fundamental Group of a Group Manifold PMCID: PMC1076487 On the Foundations of a Constructive Theory of Discrete Commutative Algebra PMCID: PMC1076488 Functionality in Combinatory Logic PMCID: PMC1076489 Physics The Calculation of Relative Multiplet Strengths in a Transition Array PMCID: PMC1076490 Psychology and Anthropology The Localization of Pure Tones PMCID: PMC1076491 Zoölogy and Anatomy Acetyl Choline and Chromatophores PMCID: PMC1076492 Journal Matter Administrative content — journal masthead, notices, indexes, etc. | ||