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corundum

(Encyclopedia)corundum kərŭnˈdəm [key], mineral, aluminum oxide, Al2O3. The clear varieties are used as gems and the opaque as abrasive materials. Corundum occurs in crystals of the hexagonal system and in mass...

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...

Fath Ali Shah

(Encyclopedia)Fath Ali Shah fäth älēˈ shäˈ, fät [key], also spelled Feth Ali Shah, 1762–1834, shah of Persia (1797–1834), nephew and successor of Aga Muhammad Khan, founder of the Qajar dynasty. Most of ...

Fuller, Millard

(Encyclopedia)Fuller, Millard, 1935–2009, American entrepreneur and philanthropist, b. Lanett, Ala., grad. Auburn Univ. (B.S., 1957), Univ. of Alabama Law School (LL.B., 1960). While in law school he and a fellow...

slate

(Encyclopedia)slate, fine-grained rock formed when sedimentary rocks such as shale are metamorphosed by great pressure. Slate splits into perfectly cleaved, broad thin layers; this characteristically regular and pl...

Strand, Paul

(Encyclopedia)Strand, Paul, 1890–1976, American photographer, b. New York City. Strand studied under Lewis Hine, who introduced him to Alfred Stieglitz. At Stieglitz's famed “291” gallery, Strand had his firs...

state flowers

(Encyclopedia)state flowers. Each state of the United States has designated, usually by legislative action, one flower as its floral emblem; the rose has been designated by Congress as the national flower of the Un...

Spangenberg, August Gottlieb

(Encyclopedia)Spangenberg, August Gottlieb ouˈgo͝ost gôtˈlēp shpängˈənbĕrk [key], 1704–92, a bishop of the Moravian Church and a founder of that church in America, b. Prussia. While at the Univ. of Jena,...

Ross, John

(Encyclopedia)Ross, John, whose name in Cherokee is Kooweskoowe ko͞oˌwĭsˌko͞owēˈ [key], 1790–1866, Native American chief, b. near Lookout Mt., Tenn., of Scottish and Cherokee parents. He was educated at Ki...

Rhodes, James Ford

(Encyclopedia)Rhodes, James Ford rōdz [key], 1848–1927, American historian, b. Ohio City (now part of Cleveland). While studying in Europe he visited ironworks and steelworks in Germany and Great Britain, and up...