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china clay
(Encyclopedia)china clay, one of the purest of the clays, composed chiefly of the mineral kaolinite usually formed when granite is changed by hydrothermal metamorphism. Usage of the terms china clay and kaolin is n...clay pan
(Encyclopedia)clay pan: see hardpan.boulder clay
(Encyclopedia)boulder clay: see drift.Macomb
(Encyclopedia)Macomb, city (1990 pop. 19,952), seat of McDonough co., W Ill.; inc. as a city 1856. A trade and manufacturing center in a rich farm, clay, and coal region, the city is known for its artistic clay pro...Presidential Range
(Encyclopedia)Presidential Range, group of the White Mts., N N.H., so called from the names of its peaks. Mt. Washington (6,288 ft/1,917 m) is the highest peak in New Hampshire; a meteorological station is at the s...Berkman, Alexander
(Encyclopedia)Berkman, Alexander bĕrkˈmän, bûrkˈmən [key], 1870–1936, anarchist, b. Vilna (then in Russian Lithuania). He immigrated to the United States c.1887. Angered by the violent suppression of the Ho...kaolinite
(Encyclopedia)kaolinite kāˈəlĭnīt [key], clay mineral crystallizing in the monoclinic system and forming the chief constituent of china clay and kaolin. It is a hydrous aluminum silicate commonly formed by the...firing
(Encyclopedia)firing, process of treating clay or other plastic ceramic materials with heat to produce a hard, durable but brittle material such as pottery. Primitive potters baked their clay in an open fire, but f...Missouri Compromise
(Encyclopedia)Missouri Compromise, 1820–21, measures passed by the U.S. Congress to end the first of a series of crises concerning the extension of slavery. By 1818, Missouri Territory had gained sufficient popul...Kendall, Amos
(Encyclopedia)Kendall, Amos kĕnˈdəl [key], 1789–1869, American journalist and statesman, b. Dunstable, Middlesex co., Mass. He edited (1816–29) at Frankfort, Ky., the Argus of Western America, one of the mos...Browse by Subject
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