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Kroll, Leon
(Encyclopedia)Kroll, Leon krōl [key], 1884–1974, American painter and lithographer, b. New York City. Kroll studied in New York with J. H. Twachtman and later in Paris. He returned to New York, where he became a...Luray
(Encyclopedia)Luray lo͝orāˈ [key], town (1990 pop. 4,587), seat of Page co., N Va., in the Shenandoah valley, in a farm area; inc. 1812. There is light manufacturing and the town is the headquarters of Shenandoa...cinnabar
(Encyclopedia)cinnabar sĭnˈəbär [key], mineral, the sulfide of mercury, HgS. Deep red in color, it is used as a pigment (see vermilion), but principally it is a source of the metal mercury. It is mined in Spain...siderite
(Encyclopedia)siderite kălˈĭbīt [key], a mineral, varying in color from brown, green, or gray to black and occurring in nature in massive and crystalline form. A carbonate of iron, FeCO3, it serves as an iron o...Perkin, Sir William Henry
(Encyclopedia)Perkin, Sir William Henry, 1838–1907, English chemist. In 1856 he discovered the first aniline dye (aniline purple, known as mauve and mauveine); by founding a factory to make it, Perkin established...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 it is valued for...Worcester ware
(Encyclopedia)Worcester ware, ceramic ware, first manufactured in 1751, when the Lowdin pottery was moved from Bristol to Worcester. Soft paste was employed, and tea services, vases, armorial mugs, and portrait pla...lanthanum
(Encyclopedia)lanthanum lănˈthənəm [key] [Gr.,=to lie hidden], metallic chemical element; symbol La; at. no. 57; at. wt. 138.90547; m.p. about 920℃; b.p. about 3,460℃; sp. gr. 6.19 at 25℃; valence +3. Lan...plainsong
(Encyclopedia)plainsong or plainchant, the unharmonized chant of the medieval Christian liturgies in Europe and the Middle East; usually synonymous with Gregorian chant, the liturgical music of the Roman Catholic C...germanium
(Encyclopedia)germanium jərmāˈnēəm [key] [from Germany], semimetallic chemical element; symbol Ge; at. no. 32; at. wt. 72.63; m.p. 937.4℃; b.p. 2,830℃; sp. gr. 5.323 at 25℃; valence +2 or +4. Pure german...Browse by Subject
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