This journal provides immediate access to some articles. Volume 15(6); June 15, 1929 Astronomy SOME NEW FEATURES OF THE ATMOSPHERIC OXYGEN BANDS, AND THE RELATIVE ABUNDANCE OF THE ISOTOPES O16, O18 PMCID: PMC522492 Botany STUDIES ON THE GROWTH OF ROOT HAIRS IN SOLUTIONS. THE PH MOLAR RATE RELATION FOR BRASSICA OLERACEA IN CALCIUM SULPHATE PMCID: PMC522491 Chemistry THE RATE OF DECOMPOSITION OF NITROGEN PENTOXIDE AT MODERATELY LOW PRESSURE PMCID: PMC522488 TYPES OF UNIMOLECULAR REACTIONS PMCID: PMC522489 THE VALENCE OF SULFUR IN DITHIONATES PMCID: PMC522490 Genetics THE OCCURRENCE OF A NICOTIANA GLUTINOSA HAPLONT PMCID: PMC522496 Geology and Paleontology FOSSIL PLANTS AND MOUNTAIN UPLIFT IN THE PACIFIC STATES PMCID: PMC522493 Mathematics ON THE LINEAR CONNECTION INDEX OF THE ALGEBRAIC SURFACES zn = (fx, y) PMCID: PMC522495 Physics FURTHER REMARKS CONCERNING THERMIONIC “A” AND “b,” A REVISION AND EXTENSION PMCID: PMC522497 ON THE RAMAN EFFECT IN DIATOMIC GASES. II PMCID: PMC522498 ON THE THEORY OF ELECTRON SCATTERING IN GASES PMCID: PMC522499 MOLECULAR BINDING AND LOW 5S TERMS OF N+ AND C PMCID: PMC522500 WAVE-LENGTH OF THE K LINES OF COPPER USING RULED GRATINGS PMCID: PMC522501 EFFECT OF VOLUME CHANGES ON THE INFRA-RED VIBRATIONS OF SIMPLE CRYSTALS PMCID: PMC522502 Zoölogy THE ANALYSIS OF A CONCRETE CASE OF INTERGRADATION BETWEEN TWO SUBSPECIES. II. ADDITIONAL DATA AND INTERPRETATIONS PMCID: PMC522494 | ||