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Features

The Purification and Manufacture of Human Interferons

Their promise is still not fulfilled, but now their genes have been isolated and cloned in E. coli. The bacteria are making interferon in quantity and the bacterial product is undergoing clinical trials

By Sidney Pestka

Magnetic Fields in the Cosmos

The dynamo mechanism for the generation of magnetic fields explains why Venus has no field, why the sun has an oscillating field and why the dominant galactic field is parallel to the plane of the galactic disk

By E. N. Parker

Interstellar Matter in Meteorites

Carbonaceous chondrites, the most primitive meteorites, incorporate material originating outside the solar system, including matter expelled by supernovas and other stars

By Roy S. Lewis and Edward Anders

The Chemical Defenses of Termites

Soft-bodied and blind, termites are subject to predation. In defense termite soldiers attack intruders with an array of sophisticated irritants, toxins, anticoagulants and glues

By Glenn D. Prestwich

Rational Collective Choice

Axiomatic analysis of voting systems has probed the compatibility of several desirable properties of an ideal method. Compromises among rationality, decisiveness and equality seem unavoidable

By Douglas H. Blair and Robert A. Pollak

The Stave Churches of Norway

In the 10th century Norwegian builders blended pagan and Christian elements in wood churches. Some are stIll standing, demonstrating that with sound design and maintenance wood buildings can be permanent

By Petter Aune, Ronald L. Sack and Arne Selberg

Digital Typography

Most type is now produced not by casting metal or by photography but by computer. The digital typesetter can create new letterforms with the flexibility of a scribe at up to 15,000 characters per second

By Charles Bigelow and Donald Day

Departments

  • 50 and 100 Years Ago: August 1983

  • Mathematical Games, August 1983

  • Trauma

  • Science and the Citizen, August 1983

  • Letters

    Letters to the Editors, August 1983

  • Recommended

    Books, August 1983

  • Amateur Scientist

    The Amateur Scientist

  • Departments

    The Authors, August 1983

  • Bibliography, August 1983

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