(Encyclopedia) ErzgebirgeErzgebirgeĕrtsˈgəbĭrˌgə [key] [Ger.,=ore mountains], Czech Krušné Hory, mountain range, along the Czech–German border, extending c.95 mi (150 km) from the Fichtelgebirge in…
(Encyclopedia) prospecting, search for mineral deposits suitable for mining. Modern prospecting has replaced earlier methods based on chance or superstition (e.g., use of the divining rod) with…
(Encyclopedia) KhersonKhersonkhĕrsônˈ [key], city (1989 pop. 355,000), capital of Kherson region, S Ukraine, on the Dnieper River near its mouth on the Black Sea. It is a rail junction and a sea and…
(Encyclopedia) refining, any of various processes for separating impurities from crude or semifinished materials. It includes the finer processes of metallurgy, the fractional distillation of…
(Encyclopedia) HueHuehwā [key], city (1989 pop. 260,489), former capital of the historic region of Annam, Vietnam, in a rich farming area on the Hue River near the South China Sea. Probably founded…
(Encyclopedia) silver, metallic chemical element; symbol Ag [Lat. argentum]; at. no. 47; at. wt. 107.8682; m.p. 961.93℃; b.p. 2,212℃; sp. gr. 10.5 at 20℃; valence +1 or +2. Pure silver is nearly…
(Encyclopedia) MonroviaMonroviamənrōˈvēə [key], city (1986 est. pop. 465,000), capital of the Republic of Liberia, NW Liberia, a port on the Atlantic Ocean at the mouth of the St. Paul River.…
