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Science, New Series, Vol. 256, No. 5063, Jun. 12, 1992


Previous Issue: New Series, Vol. 256, No. 5062, Jun. 5, 1992
Next Issue: New Series, Vol. 256, No. 5064, Jun. 19, 1992


Front Matter (13 pp.)
Editorial: Congressional Pork Versus Peer Review, p. 1497
Richard S. Nicholson


Letters
AIDS Origin, p. 1502
Gerald Myers
Museum Collections: Why Are They There?, p. 1502
Frederick R. Schram
Mammalian Diversity in South America, pp. 1502-1505
R. Terry Chesser; Shannon J. Hackett; Michael A. Mares


ScienceScope, p. 1507
David P. Hamilton


News and Comment
Russian Space Science Limps On, pp. 1508-1509
Peter Aldhous
Skeptics Pour Cold Water on a Russian `Fire Sale', pp. 1510-1511
David P. Hamilton
Societies Try the Direct Approach, p. 1511
Peter Aldhous
New Results Yield No Culprit for Missing Solar Neutrinos, pp. 1512-1513
Gary Taubes
Molecular `Surgery' for Brain Tumors, p. 1513
Richard Stone


Random Samples, pp. 1514-1515
Constance Holden


Research News
A New Take on Anthropoid Origins, pp. 1516-1517
Elizabeth Culotta
The Quest for a Theory of Everything Hits Some Snags, pp. 1518-1519
Faye Flam
How the Brain `Sees' Borders Where There Are None, pp. 1520-1521
Ingrid Winckelgren
An About-Face for Modern Human Origins, p. 1521
Ann Gibbons
A First in Cell Transplantation: Researchers Organize, Meet, p. 1522
Stephen S. Hall


Perspectives
Skiing the Reaction Rate Slopes, pp. 1523-1524
R. A. Marcus
Epidemic Cholera in the Americas, pp. 1524-1525
R. I. Glass; M. Libel; A. D. Brandling-Bennett


Experimental Constraints on the Theory of High-Tc Superconductivity, pp. 1526-1531
P. W. Anderson

Shock Waves in Stellar Atmospheres and Breaking Waves on an Ocean Beach, pp. 1531-1536
George Wallerstein; Steve Elgar


Reports
Slow Crack Growth in Single-Crystal Silicon, pp. 1537-1539
J. a. Connally; S. B. Brown
How to Make Water Run Uphill, pp. 1539-1541
Manoj K. Chaudhury; George M. Whitesides
Observation of Transition-State Vibrational Thresholds in the Rate of Dissociation of Ketene, pp. 1541-1544
Edward R. Lovejoy; Sang Kyu Kim; C. Bradley Moore
Mechanism of the Rhodium Porphyrin-Catalyzed Cyclopropanation of Alkenes, pp. 1544-1547
Jana L. Maxwell; Kathlynn C. Brown; David W. Bartley; Thomas Kodadek
Glassy Microspherules (Microtektites) from an Upper Devonian Limestone, pp. 1547-1550
Kun Wang
In Vivo Gene Transfer with Retroviral Vector-Producer Cells for Treatment of Experimental Brain Tumors, pp. 1550-1552
Kenneth W. Culver; Zvi Ram; Stuart Wallbridge; Hiroyuki Ishii; Edward H. Oldfield; R. Michael Blaese
Oxytocin Gene Expression in Rat Uterus, pp. 1553-1555
Diana L. Lefebvre; Adel Giaid; Hugh Bennett; Richard Larivière; Hans H. Zingg
Early Stages of Motor Neuron Differentiation Revealed by Expression of Homeobox Gene Islet-1, pp. 1555-1560
Johan Ericson; Stefan Thor; Thomas Edlund; Thomas M. Jessell; Toshiya Yamada
Galactose Oxidation in the Design of Immunogenic Vaccines, pp. 1560-1563
Biao Zheng; Sara J. Brett; John P. Tite; M. Robert Lifely; Thomas A. Brodie; John Rhodes
Calcium Entry Through Kainate Receptors and Resulting Potassium-Channel Blockade in Bergmann Glial Cells, pp. 1563-1566
T. Müller; T. Möller; T. Berger; J. Schnitzer; H. Kettenmann
Calcium-Permeable AMPA-Kainate Receptors in Fusiform Cerebellar Glial Cells, pp. 1566-1570
N. Burnashev; A. Khodorova; P. Jonas; P. J. Helm; W. Wisden; H. Monyer; P. H. Seeburg; B. Sakmann
Hebbian Depression of Isolated Neuromuscular Synapses in Vitro, pp. 1570-1573
Yang Dan; Mu-ming Poo


Book Reviews
Comparative Oology, p. 1574
Egg Incubation. Its Effects on Embryonic Development in Birds and Reptiles.
D. Charles Deeming; Mark W. J. Ferguson
Review author[s]: Barry Sinervo
An Appetite, pp. 1574-1575
Sodium Hunger. The Search for a Salty Taste.
Jay Schulkin
Review author[s]: M. Ian Phillips
The Serpentine Problem, p. 1575
The Ecology of Areas with Serpentinized Rocks. A World View.
B. A. Roberts; J. Proctor
Review author[s]: Alan J. M. Baker
Phasing Techniques, pp. 1575-1576
Direct Methods of Solving Crystal Structures.
Henk Schenk
Review author[s]: David A. Langs
Books Received, pp. 1576-1578


Back Matter (22 pp.)

Previous Issue: New Series, Vol. 256, No. 5062, Jun. 5, 1992
Next Issue: New Series, Vol. 256, No. 5064, Jun. 19, 1992



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