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Table of Contents

June 01, 1948; vol. 34 no. 6

Bacteriology

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The Effect of Irradiation on Recombination in Escherichia Coli
Felix Haas, Orville Wyss, and Wilson S. Stone

PNAS June 1, 1948 34 (6) 229-232; https://doi.org/10.1073/pnas.34.6.229
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Strain Specificity and Production of Antibiotic Sub-stances
Warfield Garson and Selman A. Waksman

PNAS June 1, 1948 34 (6) 232-239; https://doi.org/10.1073/pnas.34.6.232

Engineering

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The Gas Turbine and Its Significance as a Prime Mover
C. Richard Soderberg

PNAS June 1, 1948 34 (6) 239-245; https://doi.org/10.1073/pnas.34.6.239

Genetics

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New Facts on Sex Determination in Drosophila Melanogaster
Richard B. Goldschmidt

PNAS June 1, 1948 34 (6) 245-252; https://doi.org/10.1073/pnas.34.6.245
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Pigments of Yellow-Eyed Races of the Black-Eyed Susan (Rudbeckia Hirta)
Stanley G. Stephens and Albert F. Blakeslee

PNAS June 1, 1948 34 (6) 252-258; https://doi.org/10.1073/pnas.34.6.252

Mathematics

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On the Existence of Solutions of Certain Equations in a Finite Field
L. K. Hua and H. S. Vandiver

PNAS June 1, 1948 34 (6) 258-263; https://doi.org/10.1073/pnas.34.6.258
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Groups, Categories and Duality
Saunders MacLane

PNAS June 1, 1948 34 (6) 263-267; https://doi.org/10.1073/pnas.34.6.263
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Methods of Symmetry and Critical Points of Harmonic Functions
J. L. Walsh

PNAS June 1, 1948 34 (6) 267-271; https://doi.org/10.1073/pnas.34.6.267

Pathology

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Tuberculosis in Germany
Esmond R. Long

PNAS June 1, 1948 34 (6) 271-277; https://doi.org/10.1073/pnas.34.6.271

Physics

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Some Relations Between the F's and F²'s of X-Ray Diffraction
M. J. Buerger

PNAS June 1, 1948 34 (6) 277-285; https://doi.org/10.1073/pnas.34.6.277
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Stability of the Laminar Flow Through a Straight Pipe of Circular Cross-Section to Infinitesimal Disturbances Which are Symmetrical about the Axis of the Pipe
C. L. Pekeris

PNAS June 1, 1948 34 (6) 285-295; https://doi.org/10.1073/pnas.34.6.285

Psychology

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The Mechanism of Flow for Solid Metals
Henry Eyring, Jay W. Fredrickson, and Dan McLachlan Jr.

PNAS June 1, 1948 34 (6) 295-304; https://doi.org/10.1073/pnas.34.6.295

Zoology

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Evidence for Aging as a Consequence of Growth Cessation
Albert I. Lansing

PNAS June 1, 1948 34 (6) 304-310; https://doi.org/10.1073/pnas.34.6.304

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