Contents

Contents

• Agricultural Research Institute

  By LEROY VORIS

  Science18 Jul 1952 : 3 Full AccessRestricted Access

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• Meetings & Conferences

  Science18 Jul 1952 : 12 Full AccessRestricted Access

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• Microbial Selection

  By Vernon Bryson, Waclaw Szybalski

  Science18 Jul 1952 : 45-51 Full AccessRestricted Access

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• News and Notes

  Science18 Jul 1952 : 51-56 Full AccessRestricted Access

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• Disease Resistance and Early Testing of Maize

  By C. C. Wernham

  Science18 Jul 1952 : 57-58 Full AccessRestricted Access

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• Chemical Constitution and Biological Activity of some Organophosphorus Compounds

  By D. Ramaswami, E. R. Kirch, Elizabeth H. Jenney

  Science18 Jul 1952 : 58-60 Full AccessRestricted Access

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• The Recording of Flight Movements in Insects

  By Edward G. Boettiger, Edwin Furshpan

  Science18 Jul 1952 : 60-61 Full AccessRestricted Access

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• Paleobotanical Investigations in Naval Petroleum Reserve No. 4, Alaska

  By Chester A. Arnold

  Science18 Jul 1952 : 61-62 Full AccessRestricted Access

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• Nomographs for Determining Seiche Periods

  By James L. Verber

  Science18 Jul 1952 : 62-63 Full AccessRestricted Access

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• Analysis of Growth of the Chick Marginal Blastoderm

  By Allen B. Schlesinger

  Science18 Jul 1952 : 64-65 Full AccessRestricted Access

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• On the Nature of the So-Called Background Material in Estrogen Fractions of Extracts Prepared from Hydrolyzed Urine

  By Josephine B. Garst, Harry B. Friedgood

  Science18 Jul 1952 : 65-66 Full AccessRestricted Access

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• Inbred Strains of Culex Mosquitoes

  By J. B. Kitzmiller

  Science18 Jul 1952 : 66-67 Full AccessRestricted Access

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• Vitality of the Aged

  By ROBERT J. MYERS

  Science18 Jul 1952 : 67-68 Full AccessRestricted Access

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• Science and Technology in Unesco

  By MAURICE B. VISSCHER

  Science18 Jul 1952 : 68-70 Full AccessRestricted Access

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• Perpetual Motion and Perpetual Research

  By WALTER ROSE, J. J. BROWN

  Science18 Jul 1952 : 70-71 Full AccessRestricted Access

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• Die Sonnenkorona: Beobachtungen der Korona 1939-1949, Vol. I. M. Waldmeier. Basel: Verlag Birkhäuser, 1951. 270 pp. Sw. fr. 24.60; cloth, Sw. fr. 28.60

  By K. W. MEISSNER

  Science18 Jul 1952 : 71 Full AccessRestricted Access

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• Organic Chemistry (Holleman's). Rev. by J. P. Wibaut; trans. from 16th Dutch ed. by Samuel Coffey. Houston-Amsterdam: Elsevier, 1951. 660 pp. $9.00

  By ROBERT C. ELDERFIELD

  Science18 Jul 1952 : 71-72 Full AccessRestricted Access

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• The Geography of Europe. 2nd ed. George D. Hubbard. New York: Appleton-Century-Crofts, 1952. 870 pp. $6.75

  By RALPH E. OLSON

  Science18 Jul 1952 : 72 Full AccessRestricted Access

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• The Chemistry of Lignin. Friedrich Emil Brauns. New York: Academic Press, 1952. 808 pp. $14.50

  By RALPH L. HOSSFELD

  Science18 Jul 1952 : 72 Full AccessRestricted Access

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