Word: disks
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Dates: during 1930-1939
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Reduced to simplest terms, the machine has ten "integrators," each of which is set by a hand dial to compute the effect of a variable quantity on the problem to be solved. Each dial sets two movable parts -an 8-in. stainless steel disk, mirror-smooth, and a smaller wheel with a knife edge in contact with the disk. Governed by precisely controlled friction, the speed of the small wheel is the crucial factor in solving any problem. A bevel gearing delivers that factor to the "answer table" where the factors from all the integrators are combined and the final...
Last week Mount Wilson's big mirror got its first coat of aluminum, a film .00001 in. thick. The method of application was developed by Dr. John Donovan Strong and others from a plating process first hit upon by Thomas Edison. The glass disk is first thoroughly cleaned with blasts of electrons. It is then placed in a big sealed tank from which pumps suck almost all the air. Within the tank is a coil of tungsten wire covered with aluminum. When the wire is electrically heated the aluminum boils off as a vapor which, when it strikes...
...phonograph records of the speech in which President von Hindenburg asked Germans to vote Ja in the last plebiscite. when the issue was Adolf Hitler's break with the Disarmament Conference and the League of Nations (TIME, Nov. 20). From this record appropriate excerpts were transferred to a new disk for broadcasting, and all last week the dead Hindenburg campaigned for the live Hitler...
When the device is in operation the patient stands so that the x-rays throw shadows of his bones and viscera upon a fluoroscopic screen. A television scanning disk looks over the grey shadows piece meal, lets them illuminate three photo electric cells. One cell responds only to heavy shadows, another to light shadows, the third to medium greys. In turn one cell activates a red neon tube, another a yellow helium tube, the third a blue mercury tube. Lenses combine those col ors and a second scanning disk synchronized with the first paints a colored x-ray image...
...powerful U. S. generators of electricity to shoot at atoms are Professor Lawrence's 5,000,000-volt generator at Berkeley and Professor Robert J. Van de Graaff's 10,000,000-volt one at Round Hill, Mass. Professor Lawrence gets his effect by whirling a loin. disk in an 85-ton magnet. Last week he said that he was substituting a 40-in. disk, to get 20,000,000-voltage. In Professor Van de Graaff's machine moving paper belts brush static electricity upon huge metal balls. A modification, for which he already...