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siderite

(Encyclopedia) sideritesideritesĭdˈərīt [key] or chalybitesideritekălˈĭbīt [key], a mineral, varying in color from brown, green, or gray to black and occurring in nature in massive and crystalline…

Southdown sheep

(Encyclopedia) Southdown sheep, mutton breed of sheep originated on the South Downs of Sussex, England, and now raised throughout the world. It is a small sheep, the most thickset of all breeds, and…

Albright, Ivan Le Lorraine

(Encyclopedia) Albright, Ivan Le LorraineAlbright, Ivan Le Lorraineôlˈbrīt [key], 1897–1983, American painter, b. North Harvey, Ill. Allied with the Magic Realist group, Albright developed a style…

ammonium sulfate

(Encyclopedia) ammonium sulfate, chemical compound, (NH4)2SO4, a colorless-to-gray, rhombohedral crystalline substance that occurs in nature as the mineral mascagnite. It is soluble in water and…

fulminate

(Encyclopedia) fulminatefulminatefŭlˈmĭnāt [key], any salt of fulminic acid, HONC, a highly unstable compound known only in solution. The term is most commonly applied to the explosive mercury (II)…

Foulis, Andrew

(Encyclopedia) Foulis, AndrewFoulis, Andrewfoulz [key], 1712–75, and Robert Foulis, 1707–76, Scottish printers, brothers. They worked in partnership as printers to the Univ. of Glasgow. Their…

Ferris, Woodbridge Nathan

(Encyclopedia) Ferris, Woodbridge Nathan, 1853–1928, American educator and public official, b. Tioga co., N.Y. After study (1873–74) at the Univ. of Michigan, he taught in country schools, and became…

Valle, Pietro della

(Encyclopedia) Valle, Pietro dellaValle, Pietro dellapyĕˈtrō dĕlˈlä välˈlā [key], 1586–1652, Italian traveler in Asia. He sailed (1614) from Venice; spent a year in Constantinople, where he studied…

White, Stewart Edward

(Encyclopedia) White, Stewart Edward, 1873–1946, American author, b. Grand Rapids, Mich., grad. Univ. of Michigan, 1895. The stories collected in The Claim Jumpers (1901) and The Blazed Trail (1902)…