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Table of Contents

June 15, 1929; vol. 15 no. 6

Chemistry

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    THE RATE OF DECOMPOSITION OF NITROGEN PENTOXIDE AT MODERATELY LOW PRESSURE
    H. C. Ramsperger, M. E. Nordberg, and R. C. Tolman
    PNAS June 15, 1929 15 (6) 453-459; https://doi.org/10.1073/pnas.15.6.453
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    TYPES OF UNIMOLECULAR REACTIONS
    Oscar Knefler Rice
    PNAS June 15, 1929 15 (6) 459-462; https://doi.org/10.1073/pnas.15.6.459
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    THE VALENCE OF SULFUR IN DITHIONATES
    Ralph E. Winger and Don M. Yost
    PNAS June 15, 1929 15 (6) 462-464; https://doi.org/10.1073/pnas.15.6.462

Botany

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    STUDIES ON THE GROWTH OF ROOT HAIRS IN SOLUTIONS. THE PH MOLAR RATE RELATION FOR BRASSICA OLERACEA IN CALCIUM SULPHATE
    Wanda K. Farr
    PNAS June 15, 1929 15 (6) 464-470; https://doi.org/10.1073/pnas.15.6.464

Astronomy

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    SOME NEW FEATURES OF THE ATMOSPHERIC OXYGEN BANDS, AND THE RELATIVE ABUNDANCE OF THE ISOTOPES O16, O18
    Harold D. Babcock
    PNAS June 15, 1929 15 (6) 471-477; https://doi.org/10.1073/pnas.15.6.471

Geology and Paleontology

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    FOSSIL PLANTS AND MOUNTAIN UPLIFT IN THE PACIFIC STATES
    Edward W. Berry
    PNAS June 15, 1929 15 (6) 477-480; https://doi.org/10.1073/pnas.15.6.477

ZoÖlogy

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    THE ANALYSIS OF A CONCRETE CASE OF INTERGRADATION BETWEEN TWO SUBSPECIES. II. ADDITIONAL DATA AND INTERPRETATIONS
    Francis B. Sumner
    PNAS June 15, 1929 15 (6) 481-493; https://doi.org/10.1073/pnas.15.6.481

Mathematics

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    ON THE LINEAR CONNECTION INDEX OF THE ALGEBRAIC SURFACES zn = (fx, y)
    Oscar Zariski
    PNAS June 15, 1929 15 (6) 494-501; https://doi.org/10.1073/pnas.15.6.494

Genetics

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    THE OCCURRENCE OF A NICOTIANA GLUTINOSA HAPLONT
    Thomas Harper Goodspeed and Priscilla Avery
    PNAS June 15, 1929 15 (6) 502-504; https://doi.org/10.1073/pnas.15.6.502

Physics

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    FURTHER REMARKS CONCERNING THERMIONIC “A” AND “b,” A REVISION AND EXTENSION
    Edwin H. Hall
    PNAS June 15, 1929 15 (6) 504-514; https://doi.org/10.1073/pnas.15.6.504
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    ON THE RAMAN EFFECT IN DIATOMIC GASES. II
    F. Rasetti
    PNAS June 15, 1929 15 (6) 515-519; https://doi.org/10.1073/pnas.15.6.515
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    ON THE THEORY OF ELECTRON SCATTERING IN GASES
    Allan C. G. Mitchell
    PNAS June 15, 1929 15 (6) 520-525; https://doi.org/10.1073/pnas.15.6.520
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    MOLECULAR BINDING AND LOW 5S TERMS OF N+ AND C
    Louis A. Turner
    PNAS June 15, 1929 15 (6) 526-528; https://doi.org/10.1073/pnas.15.6.526
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    WAVE-LENGTH OF THE K LINES OF COPPER USING RULED GRATINGS
    J. A. Bearden
    PNAS June 15, 1929 15 (6) 528-533; https://doi.org/10.1073/pnas.15.6.528
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    EFFECT OF VOLUME CHANGES ON THE INFRA-RED VIBRATIONS OF SIMPLE CRYSTALS
    E. O. Salant
    PNAS June 15, 1929 15 (6) 533-537; https://doi.org/10.1073/pnas.15.6.533
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