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This journal provides immediate access to some articles. Volume 15(8); August 15, 1929 Biology CHEMICAL INVESTIGATION OF BIOLOGICALLY ACTIVE LIPOIDS OF TUBERCLE BACILLI PMCID: PMC522520 A HOMOZYGOUS TRANSLOCATION IN DROSOPHILA MELANOGASTER PMCID: PMC522521 Chemistry THE ENTROPY OF HYDROGEN PMCID: PMC522531 IRREVERSIBLE TRANSFORMATIONS OF ORGANIC COMPOUNDS UNDER HIGH PRESSURES: (Preliminary Paper) PMCID: PMC522532 Genetics DOES NATURAL IONIZING RADIATION CONTROL RATE OF MUTATION? PMCID: PMC522519 Mathematics THE INVALIDITY OF A COMMON USED METHOD FOR COMPUTING A CERTAIN PROBABLE ERROR PMCID: PMC522527 ON CERTAIN FOURIER SERIES EXPANSIONS OF DOUBLY PERIODIC FUNCTIONS OF THE THIRD KIND PMCID: PMC522528 AUTOMORPHISM COMMUTATORS PMCID: PMC522529 ARITHMETIZED TRIGONOMETRICAL EXPANSIONS OF DOUBLY PERIODIC FUNCTIONS OF THE THIRD KIND PMCID: PMC522530 Physics MAGNETIC SUSCEPTIBILITY OF NITRIC OXIDE AT 296°K. AND 216°K PMCID: PMC522522 HYPER-FINE STRUCTURE IN SPECTRAL LINES— ESPECIALLY THOSE OF SINGLY IONIZED PRASEODYMIUM PMCID: PMC522523 A METHOD OF PRODUCING LONG SINGLE-CRYSTALS OF METAL AND A STUDY OF THE FACTORS INFLUENCING CRYSTAL-ORIENTATION AND PERFECTION PMCID: PMC522524 HIGHER SPARK SPECTRA OF NEON AND ARGON IN THE EXTREME ULTRA-VIOLET PMCID: PMC522525 RELATIVE PROBABILITIES OF THE IONIZATION OF K AND L ELECTRONS OF EQUAL IONIZATION ENERGY PMCID: PMC522526 Zoölogy PROGRESS REPORT ON WEIGHT INCREASES IN LAMBS WITH AND WITHOUT RUMEN INFUSORIA PMCID: PMC522533 THE METHOD BY WHICH RUMINANTS ACQUIRE THEIR FAUNA OF INFUSORIA, AND REMARKS CONCERNING EXPERIMENTS ON THE HOST-SPECIFICITY OF THESE PROTOZOA PMCID: PMC522534 | ||