Word: vacuums
(lookup in dictionary)
(lookup stats)
Dates: during 1940-1949
Sort By: most recent first
(reverse)
...rays can be imagined as streams of infinitesimal sub-atomic particles. They are similar to radium rays and they work in exactly the same way to destroy living cells. They are created when a powerful electric current-i.e., a stream of electrons -jumps through a vacuum tube and hits a "target,", usually a piece of tungsten. The electrons batter from the tungsten a secondary stream of chargeless particles, X-rays, whose wave lengths are thousands of times shorter than those of ultraviolet light and almost as short as those of radium's gamma rays. The shorter waves...
Ford designers gave the Lincolns a new vacuum-controlled device for raising and lowering windows automatically. They also softened corners on all models, added flashy trim...
...electric refrigerators, radios, washing machines, vacuum cleaners, other household gadgets...
...Charles G. Abbot, secretary of the Smithsonian Institution and a tire less inventor of solar-energy machines. His newest eliminates many of the circulation pipes which made older models clumsy, costly, tricky. A concave cylindrical mirror, clockworked to follow the sun, focuses the solar rays on a vacuum-insulated tube filled with a heat-absorbing liquid such as black petroleum. As the petroleum heats, it rises to a reservoir, from which cool petroleum then descends into the heating element by gravity. As the reservoir gets hotter, it can be used for cooking, generating steam and even refrigerating (by the absorption...
...communiqués, do all but routine censoring. And all propaganda that the Ministry issues is directed by the Foreign Office. This leaves the Ministry of Information in the unhappy position of having no information to call its own. Sick of trying to serve their country in a vacuum, some officials of the Ministry have resigned. Last month Lord Beaverbrook, himself a publisher, took the Ministry briefly in hand but was lofted to a new job as Supply Minister before he had time to make permanent reforms...