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...
Features
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
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
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...
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...
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...
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...
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...
Departments
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
