Hybrid Wheat
Many of the problems associated with hybridizing this important grain crop are being solved. The eventual introduction of hybrid wheat on a large scale will have a substantial economic and nutritional impact...
Features
Relaxation Methods in Chemistry
By rapidly upsetting the equilibrium of a chemical reaction one can study the important mechanisms that operate in the interval between a thousandth and a billionth of a second
A Paleolithic Camp at Nice
Construction work on the French Riviera has uncovered the remains of man's earliest-known construction work: huts put up by hunters who visited the shore of the Mediterranean some 300,000 years ago...
Typesetting
Electronic typesetting systems capable of "painting" as many as 10,000 characters per second on the screen of a cathode ray tube promise to have a revolutionary effect on the printing industry...
The Energetics of Bird Flight
The metabolism of gulls and parakeets is measured during ascending, descending and level flight in the wind tunnel. The results show how flying birds can husband their "fuel"
Shock Waves in Solids
When an explosion or a projectile is directed against a solid, an intense wave of pressure and stress passes through it. Such waves can be used to study materials and also to process them...
The Bacterial Cell Wall
The tough, inflexible envelope that surrounds a bacterium is a single giant molecule made up of amino acid and sugar units. Its formation is blocked by drugs such as penicillin
Retinal Processing of Visual Images
Information is processed within the eye, and in some species it is processed to a remarkable extent. In frogs and ground squirrels the retina's integrative capacity rivals that of the cortex in primates...
Departments
50 and 100 Years Ago: May 1969
Science and the Citizen: May 1969
- Letters
Letters to the Editors, May 1969
- Recommended
Books - May 1969
- Mathematical Recreation
Mathematical Games
- Amateur Scientist
The Amateur Scientist - May 1969
- Departments
The Authors
Bibliography - May 1969
