Table of Contents

May 1942; 28 (5)

Chemistry

  • Chemistry:
    • C. B. van Niel,
    • J. O. Thomas,
    • S. Ruben,
    • and M. D. Kamen

    Radioactive Carbon as an Indicator of Carbon Dioxide Utilization: IX. The Assimilation of Carbon Dioxide by Protozoa

    PNAS 1942 28:157-161

Physics

  • Physics:
    • H. J. Stewart

    The Energy Equation for a Viscous Compressible Fluid

    PNAS 1942 28:161-164

Zoölogy

  • Zoölogy:
    • G. H. Parker

    Sensitization of Melanophores by Nerve Cutting

    PNAS 1942 28:164-170

Mathematics

  • Mathematics:
    • Y. Y. Tseng

    On Generalized Biorthogonal Expansions in Metric and Unitary Spaces

    PNAS 1942 28:170-175
  • Mathematics:
    • Einar Hille

    Representation of One-Parameter Semi-Groups of Linear Transformations

    PNAS 1942 28:175-178
  • Mathematics:
    • G. Fubini

    On a Class of Surfaces

    PNAS 1942 28:178-185

Astronomy

  • Astronomy:
    • Harlow Shapley

    Galactic and Extragalactic Studies: XIII. Note on the Comparative Diameters of Spheroidal and Spiral Galaxies

    PNAS 1942 28:186-191
  • Astronomy:
    • Harlow Shapley,
    • Virginia McKibben,
    • and Richard A. Craig

    Galactic and Extragalactic Studies: XIV. On the Magnitude Dispersion in the Period-Luminosity Relation

    PNAS 1942 28:192-199
  • Astronomy:
    • Harlow Shapley
    • and Virginia McKibben

    Galactic and Extragalactic Studies: XV. On the Distribution of Periods for 343 Cepheids in the Small Magellanic Cloud

    PNAS 1942 28:200-204

Genetics

  • Genetics:
    • L. C. Dunn
    • and Ernst Caspari

    Close Linkage between Mutations with Similar Effects

    PNAS 1942 28:205-210
  • Genetics:
    • A. Marshak
    • and William N. Takahashi

    The Effect of pH on Inactivation of Tobacco Mosiac Virus by X-Rays

    PNAS 1942 28:211-216

This Issue

  1. Chemistry
  2. Physics
  3. Zoölogy
  4. Mathematics
  5. Astronomy
  6. Genetics

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