Word: germanium
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Ultrasonic machines are used for hospital and industrial cleaning and degreasing. They can join metals previously impossible to weld or solder, drill square and other odd-shaped holes in brittle materials, such as germanium and glass. They will measure any liquid, including exotic jet fuels, and liquid oxygen in rockets. The aircraft, electronic and missile makers have been a major spur to the growth of ultrasonics. Before the development of ultrasonic cleaners, jet-engine nozzles and oil filters had to be thrown away when dirty. Now imbedded residue can be removed in minutes through the use of sound energy...
...fast is the field growing that a new development or refinement is announced almost weekly. Last week Texas Instruments began manufacturing a germanium "mesa" transistor; this week General Electric starts full production of a controlled rectifier that can handle a greater power load than a transistor...
...heat) waves. Since black surfaces radiate well, it permits the satellite to get rid of its internal heat by radiation. The system seems to be working well. Both transmitters have reported that the temperature inside Vanguard I is staying at a reasonable level, certainly below the point where the germanium transistors in the electrical circuits will be damaged...
Carcasses & Calico. To the adventuring sailors of Portugal's Prince Henry the Navigator, the idea of freedom for the African was as unheard of as the 20th century minerals germanium and uranium now being mined in the Congo. Slavery and servitude were the African's way of life, and in the first west coast trading posts established at the malarial edge of jungles as dark and green and impenetrable as the ocean bottom, native chieftains were only too glad to exchange the surplus humanity of their fiefs for the trinkets and calicoes of the newcomers. The human life...
Brooks, a Gordon McKay Professor here since 1950, has done research in the cohesive energy of alkalis, metal interfaces, lattice imperfections in metals, and the theory of electrical properties of germanium and silicon...