Attitudes Toward Desegregation
Presenting a sequel to an article of the same title that appeared in this magazine in 1956. The findings indicate a steady rise in support of integration among whites in both North and South
Features
Control Mechanisms of the Eye
The control system whereby the eye tracks a target is investigated by an engineering technique systems analysis, and is found to be a servomechanism in which retinal-image motion serves as feedback
Radio Waves from Jupiter
In 1955 the largest planet was discovered to be a source of surprisingly strong radio emissions. Now astronomers are seeking to elucidate the mechanism of the radiation
The Early Relatives of Man
New evidence from fossils of the period between 60 and 12 million years ago not only illun1inates the main stages of primate evolution but also singles out the ape stock from which the human line arose
The Thymus Hormone
The blood cells that manufacture antibodies trace their origin back to the thymus gland. It has recently been discovered that the gland also secretes a substance that enables the cells to make antibodies
Germ-Free Isolators
They are widely used to raise laboratory animals in an environment that is entirely free of microorganisms. Other potential applications are in surgery on human patients and in the manufacture of spacecraft
The Chinampas of Mexico
They are highly productive farm plots surrounded on at least three sides by canals. Created in an ancient drainage project, they were the economic foundation of the Aztec empire
Computer Experiments in Chemistry
By simulating the motions of atoms and molecules during a chemical reaction a powerful computer at Los Alamos has provided insight into chemical problems that cannot be achieved by laboratory experiments
Departments
50 and 100 Years Ago: July 1964
Science and the Citizen: July 1964
- Letters
Letters to the Editors, July 1964
- Recommended
Books
- Mathematical Recreation
Mathematical Games
- Amateur Scientist
The Amateur Scientist
- Departments
The Authors
Bibliography