Articles

 Is Sterilization the Answer?

Moni Nag
Science 3 April 1970: 62.
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 Letters to the Editor

M. H. K. Shokeir
Science 3 April 1970: 62.
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 Letters to the Editor-1

Francis A. Board
Science 3 April 1970: 62.
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 Letters to the Editor-2

George Szabo
Science 3 April 1970: 62.
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 Sublimnos: "Volkswagen" of Underwater Habitats

Alan R. Emery
Science 3 April 1970: 62-64.
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 Serratia marcescens: A Pathogen

Thomas A. Whalen
Science 3 April 1970: 64.
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 Alaska: Ground-Level View

Paul Whitney
Science 3 April 1970: 64-65.
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 Realities of Physicians Income

Forbes H. Norris, Jr.
Science 3 April 1970: 65-67.
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 Long Arm of "Security Clearances"

George D. Pappas
Science 3 April 1970: 67.
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 Conflicting Pronouncements

Melvin A. Benarde
Science 3 April 1970: 67.
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 The 1972-75 Budgets

Dael Wolfle
Science 3 April 1970: 69.
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 Metallic and Nonmetallic Behavior in Transition Metal Oxides

I. G. Austin and N. F. Mott
Science 3 April 1970: 71-77.
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 The Infant Separates Himself from His Mother

Harriet L. Rheingold and Carol O. Eckerman
Science 3 April 1970: 78-83.
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 Social Subordination, Population Density, and Mammalian Evolution

John J. Christian
Science 3 April 1970: 84-90.
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 NSF Budget: House Group Reacts to Data on Plight of Science

Philip M. Boffey
Science 3 April 1970: 95-97.
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 The Human Toll of Science

Science 3 April 1970: 96.
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 Oceanography: A "Wet NASA," Will Nixon Take the Plunge?

William Connelly
Science 3 April 1970: 98-101.
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 NEWS IN BRIEF

Science 3 April 1970: 99.
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 New Role for NASA Research Center

Science 3 April 1970: 100.
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 NSF: White House Nominates Four to Long-Unfilled Posts

John Walsh
Science 3 April 1970: 101-102.
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 Cryogenics: New Superconducting Materials Announced at Dallas

Robert W. Holcomb
Science 3 April 1970: 103.
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 Parity-Violating Nuclear Forces

Gerald L. Wick
Science 3 April 1970: 104-105.
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 Neoplastic Development. Vol. 1. Leslie Foulds. Academic Press, New York, 1969. xii + 440 pp., illus. $16.50

Paul Kotin
Science 3 April 1970: 106-107.
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 The Observation of Savage Peoples. Joseph-Marie DegéRando. Translated from the French and edited by F. C. T. Moore. University of California Press, Berkeley, 1969. xii + 124 pp. + plates. $4

Thomas B. Hinton
Science 3 April 1970: 107-108.
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 Politics and the Social Sciences. Seymour Martin Lipset, Ed. Oxford University Press, New York, 1969. xxiv + 328 pp., illus. $7.50; text ed., paper, $2.75

Angus Campbell
Science 3 April 1970: 108.
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 Development of the Functions of the Small Intestine in Mammals and Man. O. Koldovsky. Karger, Basel, 1969 (U. S. distributor, Phiebig, White Plains, N.Y.). viii + 204 pp., illus. $12.70

Florence Moog
Science 3 April 1970: 109.
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 Endocrinology and Human Behaviour. Proceedings of a conference, London, May 1967. Richard P. Michael, Ed. Oxford University Press, New York, 1968. xviii + 350 pp., illus. $18. Oxford Medical Publications

Charles W. Lloyd
Science 3 April 1970: 109-110.
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 Transfer and Storage of Energy by Molecules. Vol. 1, Electronic Energy. George M. Burnett and Alastair M. North, Eds. Wiley-Interscience, New York, 1969. xvi + 240 pp., illus. $11.95

F. S. Dainton
Science 3 April 1970: 110.
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 Books Received

Science 3 April 1970: 110.
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Geomagnetic Intensity: Changes during the Past 3000 Years in the Western Hemisphere

V. Bucha, R. E. Taylor, Rainer Berger, and E. W. Haury
Science 3 April 1970: 111-114.
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Polywater: An Attempt at Synthesis in a Gas Discharge

Algird G. Leiga, Dennis W. Vance, and Anthony T. Ward
Science 3 April 1970: 114-116.
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Tumbaga Object from the Early Classic Period, Found at Altun Ha, British Honduras (Belize)

D. M. Pendergast
Science 3 April 1970: 116-118.
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Disintegration of Charged Liquid Jets: Results with Isopropyl Alcohol

A. L. Huebner
Science 3 April 1970: 118-119.
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Crustal Layer of Seismic Velocity 6.9 to 7.6 Kilometers per Second under the Deep Oceans

G. Lafayette Maynard
Science 3 April 1970: 120-121.
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Bradykinin Inhibition by Butylated Hydroxyanis1le

Linda P. Posati and Michael J. Pallansch
Science 3 April 1970: 121-122.
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Catch Property in Single Mammalian Motor Units

R. E. Burke, P. Rudomin, and F. E. Zajac, III
Science 3 April 1970: 122-124.
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A Short-Latency Labyrinthine Input to the Vestibular Nuclei in the Pigeon

V. J. Wilson and R. M. Wylie
Science 3 April 1970: 124-127.
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Z Disc Ultrastructure in Scutal Depressor Fibers of the Barnacle

Robert A. Leyton and William C. Ullrick
Science 3 April 1970: 127-128.
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Hyperphenylalaninemia: Disaggregation of Brain Polyribosomes in Young Rats

Kikumaro Aoki and Frank L. Siegel
Science 3 April 1970: 129-130.
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Hydroxyurea: Suppression of Two-Stage Carcinogenesis in Mouse Skin

Po Chuen Chan, Allan Goldman, and Ernest L. Wynder
Science 3 April 1970: 130-132.
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Dodder Weevils in Simultaneous Association with Parasitic Plants and Their Hosts

D. M. Anderson
Science 3 April 1970: 132-133.
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Mixed Lymphocyte Cultures Produce Effector Cells: Model in vitro for Allograft Rejection

Pekka Häyry and Vittorio Defendi
Science 3 April 1970: 133-135.
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Mitochondrial RNA Synthesis during Mitosis

Hung Fan and Sheldon Penman
Science 3 April 1970: 135-138.
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Radio-Frequency Thrombosis of Vascular Malformations with a Transvascular Magnetic Catheter

James A. Taren and Trygve O. Gabrielsen
Science 3 April 1970: 138-141.
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Vibriolytic Antibody-Forming Cells: A New Application of the Pfeiffer Phenomenon

Robert F. McAlack, Jan Cerny, Jerry L. Allen, and Herman Friedman
Science 3 April 1970: 141-142.
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Heme Requirement for Reproduction of a Free-Living Nematode

W. F. Hieb, E. L. R. Stokstad, and Morton Rothstein
Science 3 April 1970: 143-144.
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Pepsinogens: Genetic Polymorphism in Man

I. Michael Samloff and Philip L. Townes
Science 3 April 1970: 144-145.
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Sleep Stage Characteristics of Long and Short Sleepers

W. B. Webb and H. W. Agnew, Jr.
Science 3 April 1970: 146-147.
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Hormonal Effects on Ontogeny of Swimming Ability in the Rat: Assessment of Central Nervous System Development

Shawn Schapiro, Manuel Salas, and Katherine Vukovich
Science 3 April 1970: 147-151.
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 Water: Nomenclature

R. A. Horne
Science 3 April 1970: 151.
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 Sex Ratios of Newborns and Schizophrenia

Michael A. Taylor
Science 3 April 1970: 151-152.
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 Regarding Periodic Phenomena

A. S. Iberall
Science 3 April 1970: 152.
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 Orientation by Pigeons

Klaus Schmidt-Koenig, Dennis L. McDonald, and William T. Keeton
Science 3 April 1970: 152-153.
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 Biochemical Toxicology of Insecticide Action

Izuru Yamamoto and R. D. O'Brien
Science 3 April 1970: 154-163.
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 Sterile Males for Control of Insect Populations

Leo E. LaChance
Science 3 April 1970: 163-166.
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 Food-Borne Toxic Microorganisms

Carl Lamanna
Science 3 April 1970: 167-170.
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 Courses

Science 3 April 1970: 170.
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