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This journal provides immediate access to some articles. Volume 15(11); November 15, 1929 Astronomy A SPECTROPHOTOMETRIC STUDY OF CLASS A STARS PMCID: PMC522566 Chemistry PRODUCTION OF HYDROXYL BY WATER VAPOR DISCHARGE PMCID: PMC522565 Genetics GENETIC FACTORS STIMULATING MUTABILITY OF THE MINIATURE-GAMMA WING CHARACTER OF DROSOPHILA VIRILIS PMCID: PMC522567 THE OCCURRENCE OF A HERITABLE TWISTED NOSE IN THE HOUSE MOUSE, MUS MUSCULUS PMCID: PMC522568 ON THE AMOUNT OF EXTERNAL MIRROR IMAGERY IN DOUBLE MONSTERS AND IDENTICAL TWINS PMCID: PMC522569 MEIOSIS IN A TRIPLOID FRAGARIA PMCID: PMC522570 CHROMOSOME BEHAVIOR IN SORBOPYRUS AND SORBARONIA PMCID: PMC522571 CHEMICAL ASPECTS OF DISEASE RESISTANCE IN THE ONION PMCID: PMC522572 Mathematics ON THE EXISTENCE OF INTEGRALS OF THE SYSTEM OF PARTIAL DIFFERENTIAL EQUATIONS Aαβii = 0 IN n VARIABLES PMCID: PMC522573 CLOSED EXTREMALS PMCID: PMC522574 NON-ABELIAN GROUPS OF ODD PRIME POWER ORDER WHICH ADMIT A MAXIMAL NUMBER OF INVERSE CORRESPONDENCIES IN AN AUTOMORPHISM PMCID: PMC522575 Physics ON THE POLARIZATION OF X-RADIATION PMCID: PMC522562 ON MOSAIC CRYSTALS PMCID: PMC522563 ON THE FOUNDATIONS OF RELATIVISTIC COSMOLOGY PMCID: PMC522564 | ||