Acute Respiratory Failure
This crisis of life has come to be regarded as a distinct clinical entity. In respiratory intensive-care units it is now being treated by teams of specially' trained physicians and supporting personnel...
Features
Amorphous-Semiconductor Switching
Solid-state devices that are glassy rather than crystalline can be employed to control the flow of electric current. They are not yet in commercial use but are under intense study all over the world...
Early Man in the West Indies
Until recently it seemed that the islands of the Caribbean were uninhabited up to about the time of Christ. Now it appears that men may have arrived 5,000 years earlier. How did they get there?...
Magnetic Recording
The storage of information in magnetic particles is an integral part of communication and data processing. The demands of different kinds of information have given rise to variations on the basic theme...
Non-Euclidean Geometry Before Euclid
Certain works of Aristotle, written 2,000 years before the advent of non-Euclidean geometry, contain references to the possibility of a non-Euclidean approach to the famous problem of parallels...
The Origin of the Oceanic Ridges
Current models of sea-floor spreading and continental drift imply convection in the earth's mantle as the driving mechanism. Critical analysis of this assumption leads to an alternative explanation...
The Receptor Site for a Bacterial Virus
A virus infects a bacterium by attaching itself to a specific site on the bacterium's surface. The chemistry of such a site is studied by seeing how it changes after dormant infection by the same virus...
How Birds Sing
The mechanism of bird song has traditionally been compared to either a wind musical instrument or the human vocal apparatus. The analysis of the bird songs themselves points toward an entirely different system...
Departments
50 and 100 Years Ago: November 1969
Science and the Citizen: November 1969
- Letters
Letters to the Editors, November 1969
- Recommended
Books
- Mathematical Recreation
Mathematical Games
- Amateur Scientist
The Amateur Scientist
- Departments
The Authors
Bibliography
