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gem, ornamental mineral or organic substance

(Encyclopedia) gem, commonly, a mineral or organic substance, cut and polished and used as an ornament. Gems also are used as seals (items of assurance) and as talismans (good-luck charms). For birthstones, see mont...

Hill, Sir Rowland

(Encyclopedia) Hill, Sir Rowland, 1795–1879, English educator, inventor, and postal reformer. He introduced the system of self-government in his school at Hazelwood in Birmingham. In his Plans for the Government a...

Franklin, Ann Smith

(Encyclopedia) Franklin, Ann Smith, 1696–1763, American printer; sister-in-law of Benjamin Franklin. After the death in 1735 of her husband, James Franklin, she carried on his commercial printing business, in Newp...

Ansbach

(Encyclopedia) Ansbach änsˈbäkh [key], city, capital of Middle Franconia, Bavaria, S Germany, on the Rezat River. A rail and road junction, Ansbach has diversified industries, includi...

Hackney

(Encyclopedia) Hackney, inner borough of Greater London, SE England, on the Lea River. Clothing manufacture (in Hackney) and printing and furniture making (in Shoredit...

Newman, Barnett

(Encyclopedia) Newman, Barnett, 1905–70, American artist, b. New York City. A member of the New York school, Newman was one of the first to reject conventional notions of spatial composition in art. Often using mo...

Wildsmith, Brian Lawrence

(Encyclopedia) Wildsmith, Brian Lawrence, 1930–2016, English children's book author and illustrator. He attended the Slade School of Fine Art, University College London (1949–52), and served in the army before b...

pitchblende

(Encyclopedia) pitchblende pĭchˈblĕndˌ [key], dark, lustrous, heavy mineral, a source of radium and uranium. Largely natural uranium oxides, triuranium octaoxide (U3O8) and uranium dioxide (UO2), it usually cont...

Albers, Josef

(Encyclopedia) Albers, Josef yōˈzĕf älˈbĕrs [key], 1888–1976, German-American painter, printmaker, designer, and teacher, b. Bottrop, Germany. After working at the Bauhaus (1920–33), Albers and his wife, t...

Emporia

(Encyclopedia) Emporia ĕmpôrˈēə [key], city (2020 pop. 24,139), seat of Lyon co., E central Kans., in the ...
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