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This journal provides immediate access to some articles. Volume 24(6); June 1938 Chemistry Evidence for a Second Thiamin PMCID: PMC1077081 Genetics The Structure of the Ring-Gland (Corpus Allatum) in Normal and Lethal Larvae of Drosophila Melanogaster PMCID: PMC1077083 Mathematics On Normal Division Algebras of Index 5 PMCID: PMC1077084 Physics The Lift and Drag Functions for an Elastic Fluid in Two Dimensional Irrotational Flow PMCID: PMC1077085 Zoölogy An Astacene-Like Carotenoid from a Pacific Coast Anemone, Epiactis Prolifera PMCID: PMC1077082 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||