Table of Contents

March 15, 1944; 30 (3)

Botany

  • Botany:
    • Ernest Ball
    • and Edgar J. Boell

    Respiratory Rates of the Shoot Tips and Maturing Tissues in Lupinus Albus and Tropaeolum Majus

    PNAS 1944 30:45-50

Genetics

  • Genetics:
    • Kenneth W. Cooper

    Invalidation of the Cytological Evidence for Reciprocal Chiasmata in the Sex Chromosome Bivalent of Male Drosophila

    PNAS 1944 30:50-54

Mathematics

  • Mathematics:
    • Alberto Barajas

    Birkhoff's Theory of Gravitation and Einstein's Theory for Weak Fields

    PNAS 1944 30:54-57
  • Mathematics:
    • Einar Hille

    On the Theory of Characters of Groups and Semi-Groups in Normed Vector Rings

    PNAS 1944 30:58-60

Astronomy

  • Astronomy:
    • Harlow Shapley

    Galactic and Extragalactic Studies

    PNAS 1944 30:61-68

This Issue

  1. Botany
  2. Genetics
  3. Mathematics
  4. Astronomy

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