This journal provides immediate access to some articles. Volume 22(11); November 1936 Anthropology and Psychology On the Nature of Aural Harmonics PMCID: PMC1076838 Astronomy Effects of Red Shifts on the Distribution of Nebulae PMCID: PMC1076828 Botany Inducement of Fruit Development by Growth-Promoting Chemicals PMCID: PMC1076829 The Importance of Ash Elements in the Cultivation of Excised Root Tips PMCID: PMC1076830 Genetics Growth Curve of Infants PMCID: PMC1076831 The Mutation Rate in Somatic Cells of Maize PMCID: PMC1076832 A Cytogenetic Demonstration of Crossing-Over Between X- and Y- Chromosomes in the Male Drosophila Melanogaster PMCID: PMC1076833 Geology and Paleontology Titanotheres from the Titus Canyon Formation, California PMCID: PMC1076835 Mathematics Number of the Abelian Groups of a Given Order PMCID: PMC1076834 Physics and Engineering On the Saturation of Exchange Forces PMCID: PMC1076836 Physiology and Biochemistry The Triple Innervation of the Crayfish Muscle PMCID: PMC1076837 Journal Matter Administrative content — journal masthead, notices, indexes, etc. | ||