Articles

 Problem-Oriented Research

Harold Gershinowitz
Science 7 May 1971: 514.
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 Male Bias and Women's Fate

Florence Moog
Science 7 May 1971: 514.
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 LETTERS

William Lockeretz
Science 7 May 1971: 514.
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 LETTERS

Ruth Rosin
Science 7 May 1971: 514.
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 LETTERS

Alice M. Brues
Science 7 May 1971: 515.
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 LETTERS

David E. Clement
Science 7 May 1971: 515.
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 Amen

Frederick H. Giles, Jr.
Science 7 May 1971: 515.
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 Changing Attitudes toward Environmental Problems

Philip H. Abelson
Science 7 May 1971: 517.
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Crystallography of the Hexagonal Ferrites

J. A. Kohn, D. W. Eckart, and Charles F. Cook, Jr.
Science 7 May 1971: 519-525.
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 The Control of Photosynthetic Carbon Metabolism

James A. Bassham
Science 7 May 1971: 526-534.
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 Social Control of Science and Technology

Michael S. Baram
Science 7 May 1971: 535-539.
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 National Academy of Sciences: Awkward Moments at the Meeting

John Walsh
Science 7 May 1971: 539-542.
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 AAAS (II): What It Is and What It Tries to Do

Philip M. Boffey
Science 7 May 1971: 542-547.
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 Hippocrates' Physic

D. S.
Science 7 May 1971: 544-545.
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 To Cure Cancer

R. J. B.
Science 7 May 1971: 545.
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 Weather Modification: A Technology Coming of Age

Allen L. Hammond
Science 7 May 1971: 548-549.
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 Book Reviews

Science 7 May 1971: 550-554.
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 Books Received

Science 7 May 1971: 554-555.
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Glazed Lunar Rocks: Origin by Impact

John W. Morgan, J. C. Laul, R. Ganapathy, and Edward Anders
Science 7 May 1971: 556-558.
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Acadian Orogeny: An Abrupt and Brief Event

Richard S. Naylor
Science 7 May 1971: 558-560.
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Land Clearance in the Irish Neolithic: New Evidence and Interpretation

J. R. Pilcher, A. G. Smith, G. W. Pearson, and Adéle Crowder
Science 7 May 1971: 560-562.
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Preparation of High-Crystallinity Polyethylene at Low Pressures

K. Hara and H. Schonhorn
Science 7 May 1971: 562-564.
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Multiple Genotypes in Individuals of Claytonia virginica

Walter H. Lewis, Royce L. Oliver, and Terry J. Luikart
Science 7 May 1971: 564-565.
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Unique Type of Angiosperm Pollen from the Family Annonaceae

James W. Walker
Science 7 May 1971: 565-567.
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Quadratic Elongation: A Quantitative Measure of Distortion in Coordination Polyhedra

Keith Robinson, G. V. Gibbs, and P. H. Ribbe
Science 7 May 1971: 567-570.
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Maintenance of Resting Potential in Anoxic Guinea Pig Ventricular Muscle: Electrogenic Sodium Pumping

T. F. McDonald and Don P. MacLeod
Science 7 May 1971: 570-572.
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Lesch-Nyhan Syndrome: Rapid Detection of Heterozygotes by Use of Hair Follicles

Stanley M. Gartler, Ronald C. Scott, Joseph L. Goldstein, Barbara Campbell, and Robert Sparkes
Science 7 May 1971: 572-574.
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Deletions in Immunoglobulin Polypeptide Chains as Evidence for Breakage and Repair in DNA

O. Smithies, D. M. Gibson, E. M. Fanning, M. E. Percy, D. M. Parr, and G. E. Connell
Science 7 May 1971: 574-577.
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Actinomycin D: Renewed RNA Synthesis after Removal from Mammalian Cells

Ann Schluederberg, Robert C. Hendel, and Surina Chavanich
Science 7 May 1971: 577-579.
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Detoxication Enzymes in the Guts of Caterpillars: An Evolutionary Answer to Plant Defenses?

Robert I. Krieger, Paul P. Feeny, and Christopher F. Wilkinson
Science 7 May 1971: 579-581.
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Mycorrhizal Enhancement of Water Transport in Soybean

G. R. Safir, J. S. Boyer, and J. W. Gerdemann
Science 7 May 1971: 581-583.
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Cholinergic Sensitivity: Normal Variability as a Function of Stimulus Background

Laszlo Z. Bito, M. Joan Dawson, and Ljerka Petrinovi\l=c`\
Science 7 May 1971: 583-585.
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Butterfly-Plant Coevolution: Has Passiflora adenopoda Won the Selectional Race with Heliconiine Butterflies?

Lawrence E. Gilbert
Science 7 May 1971: 585-586.
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Norepinephrine Pools in Rat Brain: Differences in Turnover Rates and Pathways of Metabolism

Joseph J. Schildkraut, Paul R. Draskoczy, and Pallas Sun Lo
Science 7 May 1971: 587-589.
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Activity of an NADPH-Dependent Nitroreductase in Houseffies

E. P. Lichtenstein and T. W. Fuhremann
Science 7 May 1971: 589-591.
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Neural Regeneration: Delayed Formation of Central Contacts by Insect Sensory Cells

John S. Edwards and John Palka
Science 7 May 1971: 591-594.
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Culex (Melanoconion) aikenii: Natural Vector in Panama of Endemic Venezuelan Encephalitis

Pedro Galindo and Margaret A. Grayson
Science 7 May 1971: 594-595.
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Preavoidance Blood Pressure Elevations Accompanied by Heart Rate Decreases in the Dog

David E. Anderson and Joseph V. Brady
Science 7 May 1971: 595-597.
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Free Recall and Abstractness of Stimuli

William Bevan and Joseph A. Steger
Science 7 May 1971: 597-599.
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Differential Cerebral Processing of Noise and Verbal Stimuli

Robert Cohn
Science 7 May 1971: 599-601.
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Acetylcholine Liberation from Cerebral Cortex during Paradoxical (REM) Sleep

Herbert H. Jasper and Jacques Tessier
Science 7 May 1971: 601-602.
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 Engineering Foundation Conferences

Sandford S. Cole
Science 7 May 1971: 603-604.
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