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Science, New Series, Vol. 237, No. 4820, Sep. 11, 1987


Previous Issue: New Series, Vol. 237, No. 4819, Sep. 4, 1987
Next Issue: New Series, Vol. 237, No. 4821, Sep. 18, 1987


Front Matter (18 pp.)
Scientists: Their Rewards and Humanity, p. 1281
Robert D. Havener


Letters
Carcinogenicity of Aflatoxins, p. 1283
Leonard Stoloff
Carcinogenicity of Aflatoxins: Response, pp. 1283-1284
Bruce N. Ames; Renae Magaw; Lois Swirsky Gold
Carcinogenicity of Aflatoxins: Response, p. 1284
Richard Wilson; E. A. C. Crouch


Erratum: Changes in the Distribution of American Family Income, 1947 to 1984, p. 1284


News & Comment
Agent Orange Study Hits Brick Wall, pp. 1285-1286
William Booth
MSU Faults Strobel for Dutch Elm Test, p. 1286
Leslie Roberts
Meeting on AIDS Drugs Turns into Open Forum, pp. 1287-1288
Deborah M. Barnes
The Supercollider Sweepstakes, p. 1288
Eliot Marshall
War on Cattle Disease Divides the Troops, pp. 1289-1291
John Walsh


Research News
Africa: Cradle of Modern Humans, pp. 1292-1295
Roger Lewin
Are We All in the Grip of a Great Attractor?, pp. 1296-1297
M. Mitchell Waldrop
Causality, Structure, and Common Sense, pp. 1297-1299
M. Mitchell Waldrop


Ultrahigh-Power Semiconductor Diode Laser Arrays, pp. 1305-1309
Peter S. Cross; Gary L. Harnagel; William Streifer; Donald R. Scifres; David F. Welch

Activated Oncogenes in B6C3F1 Mouse Liver Tumors: Implications for Risk Assessment, pp. 1309-1316
Steven H. Reynolds; Shari J. Stowers; Rachel M. Patterson; Robert R. Maronpot; Stuart A. Aaronson; Marshall W. Anderson

Toward a Universal Law of Generalization for Psychological Science, pp. 1317-1323
Roger N. Shepard

The tat Gene of Human T-Lymphotropic Virus Type 1 Induces Mesenchymal Tumors in Transgenic Mice, pp. 1324-1329
Michael Nerenberg; Steven H. Hinrichs; R. Kay Reynolds; George Khoury; Gilbert Jay


Reports
Turbidity Current Activity in a British Columbia Fjord, pp. 1330-1333
David B. Prior; Brian D. Bornhold; William J. Wiseman; Donald R. Lowe
Accelerated Healing of Incisional Wounds in Rats Induced by Transforming Growth Factor-β, pp. 1333-1336
Thomas A. Mustoe; Glenn F. Pierce; Arlen Thomason; Peggy Gramates; Michael B. Sporn; Thomas F. Deuel
IRAS Serendipitous Survey Observations of Pluto and Charon, pp. 1336-1340
Mark V. Sykes; Roc M. Cutri; Larry A. Lebofsky; Richard P. Binzel
A Transgenic Mouse Model for Human Neurofibromatosis, pp. 1340-1343
Steven H. Hinrichs; Michael Nerenberg; R. Kay Reynolds; George Khoury; Gilbert Jay
Monitoring Biosynthesis of Wheat Cell-Wall Phenylpropanoids in situ, pp. 1344-1346
N. G. Lewis; E. Yamamoto; J. B. Wooten; G. Just; H. Ohashi; G. H. N. Towers
Synthetic Peptide Immunoassay Distinguishes HIV Type 1 and HIV Type 2 Infections, pp. 1346-1349
John W. Gnann; Joseph B. McCormick; Sheila Mitchell; Jay A. Nelson; Michael B. A. Oldstone
The Surface Composition of Charon: Tentative Identification of Water Ice, pp. 1349-1351
Robert L. Marcialis; George H. Rieke; Larry A. Lebofsky
Functional Regions of the Envelope Glycoprotein of Human Immunodeficiency Virus Type 1, pp. 1351-1355
Mark Kowalski; Joseph Potz; Ladan Basiripour; Tatyana Dorfman; Wei Chun Goh; Ernest Terwilliger; Andrew Dayton; Craig Rosen; William Haseltine; Joseph Sodroski


Book Reviews
Choice and Consequence in Education, pp. 1357-1358
Public and Private High Schools
James S. Coleman; Thomas Hoffer
Review author[s]: Luther B. Otto
The Testing Movement and Its Founders, pp. 1358-1359
Psychological Testing and American Society, 1890-1930
Michael M. Sokal
Review author[s]: Henrika Kuklick
Singularities, p. 1360
When Time Breaks down
Arthur T. Winfree
Review author[s]: Stuart Kauffman


Back Matter (29 pp.)

Previous Issue: New Series, Vol. 237, No. 4819, Sep. 4, 1987
Next Issue: New Series, Vol. 237, No. 4821, Sep. 18, 1987



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