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This journal provides immediate access to some articles. Volume 18(1); January 1932 Astronomy The Arizona Expedition for the Study of Meteors PMCID: PMC1076155 Chemistry Reversible Coagulation in Living Tissue: X PMCID: PMC1076154 Genetics The Relationship between Chemical Constitution and Taste PMCID: PMC1076170 Genetics of Sensory Thresholds: Taste for Phenyl Thio Carbamide PMCID: PMC1076171 Elimination of Self-Sterility in the Styela Egg—A Re-Interpretation with Further Experiments PMCID: PMC1076172 Mathematics Note on Perron's Solution of the Dirichlet Problem PMCID: PMC1076161 Proof of the Quasi-Ergodic Hypothesis PMCID: PMC1076162 Seven Theorems in the Problem of Plateau PMCID: PMC1076163 On Combinatorial Topology PMCID: PMC1076164 Lines of Julia of Integral Functions PMCID: PMC1076165 On the Time Average Theorem in Dynamics PMCID: PMC1076166 Sets of Distinct Group Operators Involving All the Products but Not All the Squares PMCID: PMC1076167 Conformal Tensors. (First Note.) PMCID: PMC1076168 On the Changes of Sign of the Derivatives of a Function Defined by a Laplace Integral PMCID: PMC1076169 Physics Quantum Dynamical Correction for the Equation of State of Real Gases PMCID: PMC1076159 New Lines in the K Series of X-Rays PMCID: PMC1076160 Physiology and Pathology The Gompertz Curve as a Growth Curve PMCID: PMC1076153 The Growth of Scenedesmus Acutus PMCID: PMC1076156 Studies on the Growth Hormone of Plants: I PMCID: PMC1076157 Psychology and Anthropology The Basis of the Dependence of Visual Acuity on Illumination PMCID: PMC1076158 Zoölogy The Physiological Effect of Trihydrol in Water PMCID: PMC1076173 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||