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The Analysis of Economic Indicators

Economic indicators are specific measures such as production, prices, incomes, employment and investment. Subtle relations among them must be perceived if they are to be used to predict economic developments...

By Geoffrey H. Moore

The Nature of Asteroids

The spectra of sunlight reflected by the minor planets have yielded new clues to their mineralogical composition, their origin, their evolution and their relationship to meteorites

By Clark R. Chapman

The Fuel Consumption of Automobiles

The biggest target for energy conservation is the poor fuel economy of American cars. Here lS how their efficiency can be increased at least 40 percent by 1980

By John R. Pierce

The Cortex of the Cerebellum

In this part of the brain the pattern of connections between nerve cells has been determined in detail. The pattern is now understood well enough to relate it to the function of the neuronal networks...

By Rodolfo R. Llinás

High-Energy Reactions of Carbon

Much of the carbon chemistry in the universe takes place at high energies. Experiments with accelerated carbon ions point to processes that may have played a role in the emergence of life...

By Richard M. Lemmon and Wallace R. Erwin

A Mechanism of Disease Resistance in Plants

What makes some plants susceptible to a disease and others resistant? Study of a fungus affecting sugarcane reveals a molecular mechanism that may function in many diseases that reduce the world's food crops...

By Gary A. Strobel

Moths, Melanism and Clean Air

Some light species of moths that got dark in 19th-century England are reverting to light forms as air gets cleaner. A complex process of evolution is shaped by migration as well as by visual selection...

By J. A. Bishop and Laurence M. Cook

The Coprolites of Man

Archaeologists have unearthed fossil human feces that range in age from a few hundred to 300,000 years. Analysis of their contents is yielding information on prehistoric diet, environment and behavior...

By Vaughn M. Bryant and Glenna Williams-Dean


  • 50 and 100 Years Ago, January 1975

  • Science and the Citizen, January 1975

  • Letters

    Letters to the Editors, January 1975

  • Recommended

    Books, January 1975

  • Mathematical Recreation

    Mathematical Games, January 1975

  • Amateur Scientist

    The Amateur Scientist, January 1975

  • Departments

    The Authors, January 1975

  • Bibliography, January 1975

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