Word: corundum
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...Corundum ....... 6,000 None...
Professor Palache, "Corundum," Geol...
...carbon electrode a few bright specks of an unknown substance. This, he discovered, was hard enough to cut glass and, when applied with oil to a wheel, would cut the face of a diamond tool. Acheson called the stuff "carborundum," because he thought it was composed of corundum and carbon before it was analyzed as silicon carbide. The first crude furnace produced a quarter-pound of carborundum a day. which was sold to jewelers for $880 per Ib. Frank Tone, a good businessman as well as an able scientist, built up the company that today makes 16,000 tons...
...resemble those of Pierre L'Enfant and the Augustan Greeks. Under Architect Kahn's supervision, plans will be prepared by some 1,500 Soviet architects and engineers for four motor car, truck and cycle factories; nine plants for tractors and farm implements; then for six asbestos, corundum, and graphite factories; two locomotive works; 15 machine tool, cash register, and typewriter factories; 24 cement factories; 126 sawmills; 106 woodworking plants; 27 glass factories; 35 spinning mills; 15 woolen mills; 13 clothing factories; 112 shoe factories; 15 paper mills; 56 food products plants. How many billion dollars would be spent...
TODAY.Lithology. Special subject: The General and Microscopic Characters of Iron, Graphite, Pyrrhotite, Pyrite, Corundum, Hematite and Spinel. Dr. Wadsworth. Museum of Comparative Zoology...