Articles

 Ecologists, Unite!

Ward W. Konkle
Science 19 July 1968: 219.
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 Letters to the Editor

William Voigt, Jr.
Science 19 July 1968: 219.
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 Belgian Autocracy

Leon J. Richelle
Science 19 July 1968: 219.
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 Nuclear History

Bruce Knight
Science 19 July 1968: 219-220.
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 Federal Funds Mean Federal Control

F. A. Harper
Science 19 July 1968: 220.
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 Orwellian Parody

Kenneth Manly
Science 19 July 1968: 220.
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 The Paradox of Science in the Universities

Milton Harris and Dael Wolfle
Science 19 July 1968: 223.
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 Astronomical Research with the Large Space Telescope

Lyman Spitzer, Jr.
Science 19 July 1968: 225-229.
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 Pollen Wall Development

J. Heslop-Harrison
Science 19 July 1968: 230-237.
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 Occupation, Education, and Coronary Heart Disease

Lawrence E. Hinkle, Jr., L. Holland Whitney, W. Lehman, James Dunn, Bry Benjamin Robert King, Arlene Plakun, and Betty Flehinger
Science 19 July 1968: 238-246.
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 Brandeis Center for Violence Study: Exploring the Causes of Urban Riots

Bryce Nelson
Science 19 July 1968: 246-249.
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 France: After the Storm, Elite Schools Face Change

John Walsh
Science 19 July 1968: 249-252.
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 Oceanography: Who Will Control Cobb Seamount?

Marti Mueller
Science 19 July 1968: 252-253.
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 On the Use of Herbicides in Vietnam

Don K. Price, Walter Orr Roberts, H. Bentley Glass, Paul E. Klopsteg, Barry Commoner, Hudson Hoagland, Gerald Holton, Mina S. Rees, Leonard M. Rieser, H. B Steinbach, Kenneth V. Thimann, and Dael Wolfle
Science 19 July 1968: 253-254.
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 Supplementary Statements by Some Members of the Board of Directors

H. Bentley Glass, Hudson Hoagland, Gerald Holton, Paul E. Klopsteg, Don K. Price, Mina S. Rees, Leonard M. Rieser, Walter Orr Roberts, H. Burr Steinbach, and Dael Wolfle
Science 19 July 1968: 254-255.
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 Herbicides in the Perspectives of 20 Months and 20 Years

John A. Wheeler
Science 19 July 1968: 255-256.
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 APPOINTMENTS

Science 19 July 1968: 256.
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Venomous Animals and Their Venoms. Vol. 1, Venomous Vertebrates. Wolfgang Bücheri, Eleanor E. Buckley, and Venancio Deulofeu, Eds. Academic Press, New York, 1968. xxiv + 707 pp., illus. $24

H. L. Stahnke
Science 19 July 1968: 256.
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 Identity: Youth and Crisis. Erik H. Erikson. Norton, New York, 1968. 336 pp. Cloth, $6.95; paper, $2.95

Kenneth Keniston
Science 19 July 1968: 257-258.
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 Models of the Nervous System. Sid Deutsch. Wiley, New York, 1967. x + 266 pp., illus. $9.95

J. D. Cowan
Science 19 July 1968: 258-259.
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 The Precambrian. Vol. 3. Kalervo Rankama, Ed. Interscience (Wiley), New York, 1967. viii + 325 pp., illus. $17.50. The Geologic Systems

Pow-Foong Fan
Science 19 July 1968: 259-260.
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 Biennial Review of Anthropology, 1967. Bernard J. Siegel and Alan R. Beals, Eds. Stanford University Press, Stanford, Calif., 1967. x + 368 pp. $9

Paul Bohannan
Science 19 July 1968: 260.
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 Progress in Microbiological Techniques. C. H. Collins, Ed. Plenum, New York; Butterworths, London, 1967. x + 231 pp., illus. $11

Michael J. Pelczar, Jr.
Science 19 July 1968: 261.
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 A Guide to Feynman Diagrams in the Many-Body Problem. Richard D. Mattuck. McGraw-Hill, New York, 1967. xii + 294 pp., illus. $10.50

Angelo Bardasis
Science 19 July 1968: 261.
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 Interaction of High-Energy Particles with Nuclei. Proceedings of the International School of Physics Enrico Fermi Course 38, Varenna, June-July 1965. T. E. O. Ericson, Ed. Academic Press, New York, 1967. xiv + 330 pp., illus. $16

Carl Shakin
Science 19 July 1968: 261-262.
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 Books Received

Science 19 July 1968: 262.
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Seismic Waves within Earth's Outer Core: Multiple Reflection

Eric R. Engdahl
Science 19 July 1968: 263-264.
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Lymphoepithelial Tissues of the Intestine and Differentiation of Antibody Production

Daniel Y. E. Perey, Max D. Cooper, and Robert A. Good
Science 19 July 1968: 265-266.
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Lunar Rivers

Richard E. Lingenfelter, Stanton J. Peale, and Gerald Schubert
Science 19 July 1968: 266-269.
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Nitrogen-15: Microbiological Alteration of Abundance

R. P. Wellman, F. D. Cook, and H. R. Krouse
Science 19 July 1968: 269-270.
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Benzo[a]pyrene in Gasoline Partially Persists in Automobile Exhaust

Charles R. Begeman and Joseph M. Colucci
Science 19 July 1968: 271.
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Host Resistance Reflected in Differential Nematode Population Structures

D. R. Viglierchio and N. A. Croll
Science 19 July 1968: 271-272.
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Histochemical Fluorescence after Application of Neurochemicals to Caudate Nucleus and Septal Area in vivo

Aryeh Routtenberg, John Sladek, and William Bondareff
Science 19 July 1968: 272-274.
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Conformation and Activity of Chymotrypsin: The p^H-Dependent, Substrate-Induced Proton Uptake

James McConn, Edmond Ku, Catherine Odell, George Czerlinski, and George P. Hess
Science 19 July 1968: 274-276.
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Space-Filling Polyhedron: Its Relation to Aggregates of Soap Bubbles, Plant Cells, and Metal Crystallites

Robert Edward Williams
Science 19 July 1968: 276-277.
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A System for Preparing and Distributing Large Volumes

Harry S. Reasor and Howard M. Lenhoff
Science 19 July 1968: 277-279.
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Triops (Entomostraca) Eggs Killed Only by Boiling

D. B. Carlisle
Science 19 July 1968: 279-280.
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4-Leucine-Oxytocin: Natriuretic, Diuretic, and Antivasopressin Polypeptide

W. Y. Chan, Victor J. Hruby, George Flouret, and Vincent du Vigneaud
Science 19 July 1968: 280-281.
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Carbon Dioxide Exchange in Cotton: Some Anomalous Fluctuations

J. H. Troughton and I. R. Cowan
Science 19 July 1968: 281-283.
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Limb Regeneration: Induction in the Newborn Opossum

Merle Mizell
Science 19 July 1968: 283-286.
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Feeding and Core Temperature in Albino-Rats: Changes Induced by Preoptic Heating and Cooling

N. Herbert Spector, John R. Brobeck, and Charles L. Hamilton
Science 19 July 1968: 286-288.
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Dysbarism: Osmosis Caused by Dissolved Gas?

Johannes A. Kylstra, Ian S. Longmuir, and Michael Grace
Science 19 July 1968: 289.
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Pressure-Induced Te₇S₁₀: A Cocrystallization of Sulfur and Tellurium Helices

S. Geller
Science 19 July 1968: 290-291.
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Operant Control of Eye Movements during Human Vigilance

Stephen R. Schroeder and James G. Holland
Science 19 July 1968: 292-293.
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Temporal Relation Between Long-Lasting Aftercontractions and Action Potentials in Cat Papillary Muscles

Alberto J. Kaumann and Camille B. Olson
Science 19 July 1968: 293-295.
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Visual Evoked Response Correlates of Unconscious Mental Processes

Howard Shevrin and Dean E. Fritzler
Science 19 July 1968: 295-298.
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 Terrestrial Volcanic Belts

David L. Amsbury
Science 19 July 1968: 298.
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