the treatment of alluvial tin is not
41arctic — arctically, adv. /ahrk tik/ or, esp. for 7, /ahr tik/, adj. 1. (often cap.) of, pertaining to, or located at or near the North Pole: the arctic region. 2. coming from the North Pole or the arctic region: an arctic wind. 3. characteristic of the… …
42South Africa — Republic of, a country in S Africa; member of the Commonwealth of Nations until 1961. 42,327,458; 472,000 sq. mi. (1,222,480 sq. km). Capitals: Pretoria and Cape Town. Formerly, Union of South Africa. * * * South Africa Introduction South Africa… …
43Syria — /sear ee euh/, n. 1. Official name, Syrian Arab Republic. a republic in SW Asia at the E end of the Mediterranean. 16,137,899; 71,227 sq. mi. (184,478 sq. km). Cap.: Damascus. 2. a territory mandated to France in 1922, including the present… …
44pre-Columbian civilizations — Introduction the aboriginal American Indian (Mesoamerican Indian) cultures that evolved in Meso America (part of Mexico and Central America) and the Andean region (western South America) prior to Spanish exploration and conquest in the 16th …
45Morocco — Moroccan /meuh rok euhn/, adj., n. /meuh rok oh/, n. 1. French, Maroc. Spanish, Marruecos. a kingdom in NW Africa: formed from a sultanate that was divided into two protectorates (French Morocco and Spanish Morocco) and an international zone.… …
46New South Wales — a state in SE Australia. 5,126,217; 309,433 sq. mi. (801,430 sq. km). Cap.: Sydney. * * * State (pop., 2001: 6,609,304), southeastern Australia. Bounded by Queensland, the Pacific Ocean, Victoria, and South Australia, it has an area of 309,130 sq …
47Osmium — This article is about the chemical element. For other uses, see Osmium (disambiguation). rhenium ← osmium → iridium Ru ↑ Os ↓ Hs …
48Czech Republic — a republic in central Europe: includes the regions of Bohemia, Moravia, and part of Silesia; formerly part of Czechoslovakia; independent since 1993. 10,318,958; 30,449 sq. mi. (78,864 sq. km). Cap.: Prague. * * * Czech Republic Introduction… …
49Amazon River — Portuguese Rio Amazonas River, northern South America. It is the largest river in the world in volume and area of drainage basin, and only the Nile River of northeastern Africa exceeds it in length. It originates within 100 mi (160 km) of the… …
50Atlantic Ocean — an ocean bounded by North America and South America in the Western Hemisphere and by Europe and Africa in the Eastern Hemisphere. ab. 31,530,000 sq. mi. (81,663,000 sq. km); with connecting seas ab. 41,000,000 sq. mi. (106,100,000 sq. km);… …
