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Table of Contents

April 01, 1961; vol. 47 no. 4

Anthropology

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    CHAIRMAN'S OPENING REMARKS
    Carleton S. Coon
    PNAS April 1, 1961 47 (4) 427; https://doi.org/10.1073/pnas.47.4.427
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    PHENOMENA ASSOCIATED WITH POPULATION DENSITY
    John J. Christian
    PNAS April 1, 1961 47 (4) 428-449; https://doi.org/10.1073/pnas.47.4.428
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    EVOLUTION AND INTEGRATION OF MECHANISMS THAT REGULATE POPULATION GROWTH
    Robert L. Snyder
    PNAS April 1, 1961 47 (4) 449-455; https://doi.org/10.1073/pnas.47.4.449
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    DISCUSSION OF THE PAPERS BY CHRISTIAN AND SNYDER
    Herbert L. Ratcliffe
    PNAS April 1, 1961 47 (4) 455-458; https://doi.org/10.1073/pnas.47.4.455
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    ON BEING JUST COMPLICATED ENOUGH
    Anthony F. C. Wallace
    PNAS April 1, 1961 47 (4) 458-464; https://doi.org/10.1073/pnas.47.4.458

Biochemistry

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    INTERACTION OF SMALL IONS AND MOLECULES WITH RIBONUCLEIC ACID
    Raymond A. Brown
    PNAS April 1, 1961 47 (4) 465-469; https://doi.org/10.1073/pnas.47.4.465
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    THE DE NOVO SYNTHESIS OF POLYSACCHARIDE BY PHOSPHORYLASE
    Barbara Illingworth, David H. Brown, and Carl F. Cori
    PNAS April 1, 1961 47 (4) 469-478; https://doi.org/10.1073/pnas.47.4.469
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    THE MECHANISM OF THE DE NOVO SYNTHESIS OF POLYSACCHARIDE BY PHOSPHORYLASE
    David H. Brown, Barbara Illingworth, and Carl F. Cori
    PNAS April 1, 1961 47 (4) 479-485; https://doi.org/10.1073/pnas.47.4.479
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    CRYSTALLINE LUCIFERIN FROM A LUMINESCENT FISH, PARAPRIACANTHUS BERYCIFORMES
    F. H. Johnson, N. Sugiyama, O. Shimomura, Y. Saiga, and Y. Haneda
    PNAS April 1, 1961 47 (4) 486-489; https://doi.org/10.1073/pnas.47.4.486
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    THE IDENTIFICATION OF A RIBOSOMAL-BOUND β-GLUCOSIDASE
    H. K. Kihara, A. S. L. Hu, and H. O. Halvorson
    PNAS April 1, 1961 47 (4) 489-497; https://doi.org/10.1073/pnas.47.4.489
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    AMINO ACID TRANSFER FROM AMINOACYL-RIBONUCLEIC ACIDS TO PROTEIN ON RIBOSOMES OF ESCHERICHIA COLI
    Daniel Nathans and Fritz Lipmann
    PNAS April 1, 1961 47 (4) 497-504; https://doi.org/10.1073/pnas.47.4.497
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    RECOMBINATION DURING TRANSFORMATION IN HEMOPHILUS INFLUENZAE
    Mary Jane Voll and Sol H. Goodgal
    PNAS April 1, 1961 47 (4) 505-512; https://doi.org/10.1073/pnas.47.4.505
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    PURIFICATION AND IMMUNOLOGICAL CHARACTERIZATION OF TYPES 4 AND 5 ADENOVIRUS-SOLUBLE ANTIGENS
    Wesley C. Wilcox and Harold S. Ginsberg
    PNAS April 1, 1961 47 (4) 512-526; https://doi.org/10.1073/pnas.47.4.512

Chemistry

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    SIGNIFICANT LIQUID STRUCTURES, VI. THE VACANCY THEORY OF LIQUIDS
    Henry Eyring and Taikyue Ree
    PNAS April 1, 1961 47 (4) 526-537; https://doi.org/10.1073/pnas.47.4.526

Engineering

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    A MATHEMATICAL AID IN OPTIMIZING ENGINEERING DESIGNS
    Clarence Zener
    PNAS April 1, 1961 47 (4) 537-539; https://doi.org/10.1073/pnas.47.4.537

Genetics

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    TRANSITIONS AND TRANSVERSIONS INDUCED BY DEPURINATING AGENTS
    Elisabeth Bautz Freese
    PNAS April 1, 1961 47 (4) 540-545; https://doi.org/10.1073/pnas.47.4.540
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    FORMATION OF DUPLICATION-DEFICIENCY PRODUCTS BY ASYMMETRICAL EXCHANGE WITHIN A COMPLEX LOCUS OF DROSOPHILA MELANOGASTER
    B. H. Judd
    PNAS April 1, 1961 47 (4) 545-550; https://doi.org/10.1073/pnas.47.4.545
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    THE PROPERTIES OF ALTERED PROTEINS FROM MUTANTS BEARING ONE OR TWO LESIONS IN THE SAME GENE
    Barbara D. Maling and Charles Yanofsky
    PNAS April 1, 1961 47 (4) 551-566; https://doi.org/10.1073/pnas.47.4.551
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    PROGRESSIVE CONVERSION OF R-LOCUS EXPRESSION IN MAIZE
    Bernard C. Mikula
    PNAS April 1, 1961 47 (4) 566-571; https://doi.org/10.1073/pnas.47.4.566
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    AN XXY MALE IN THE MOUSE
    Liane Brauch Russell and Ernest H. Y. Chu
    PNAS April 1, 1961 47 (4) 571-575; https://doi.org/10.1073/pnas.47.4.571

Geophysics

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    EXTRA-TERRESTRIAL LIFE
    Philip H. Abelson
    PNAS April 1, 1961 47 (4) 575-581; https://doi.org/10.1073/pnas.47.4.575

Mathematics

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    UNIFORM CONVERGENCE OF MONOTONE SEQUENCES OF FUNCTIONS
    S. Bochner
    PNAS April 1, 1961 47 (4) 582-585; https://doi.org/10.1073/pnas.47.4.582
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    SOME ASPECTS OF THE FERMAT PROBLEM (SECOND PAPER)
    H. S. Vandiver
    PNAS April 1, 1961 47 (4) 585-590; https://doi.org/10.1073/pnas.47.4.585

Physics

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    GENERALIZED INVARIANT IMBEDDING RELATION
    R. W. Preisendorfer
    PNAS April 1, 1961 47 (4) 591-594; https://doi.org/10.1073/pnas.47.4.591

Physiology

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    SPECIFIC HOMOGRAFT TOLERANCE IN LYMPHOID CELLS OF LONGLIVED RADIATION CHIMERAS
    L. J. Cole and W. E. Davis Jr.
    PNAS April 1, 1961 47 (4) 594-602; https://doi.org/10.1073/pnas.47.4.594

Zoölogy

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    THE GEOMETRY OF COILING IN GASTROPODS
    David M. Raup
    PNAS April 1, 1961 47 (4) 602-609; https://doi.org/10.1073/pnas.47.4.602
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    PROLONGATION OF THE LIFE SPAN OF KOKANEE SALMON (ONCORHYNCHUS NERKA KENNERLYI) BY CASTRATION BEFORE BEGINNING OF GONAD DEVELOPMENT
    O. H. Robertson
    PNAS April 1, 1961 47 (4) 609-621; https://doi.org/10.1073/pnas.47.4.609
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