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coast protection

(Encyclopedia)coast protection, methods used to protect coastal lands from erosion. Beaches can exist only where a delicate dynamic equilibrium exists between the amount of sand supplied to the beach and the inevit...

Pitch Lake

(Encyclopedia)Pitch Lake, pool of pitch (asphalt), c.114 acres (46 hectares), SW Trinidad island, Trinidad and Tobago, near La Brea. The lake is believed to be formed and supplied by the seepage of natural pitch, a...

Whitehall, cities, United States

(Encyclopedia)Whitehall. 1 City (1990 pop. 20,572), Franklin co., central Ohio, a suburb of Columbus; inc. 1948. Manufactures include water coolers and packaged meats. A large federal defense construction supply ce...

water power

(Encyclopedia)water power, mechanical energy derived from falling or flowing water, e.g., rivers, streams, and the overflow of dams. The wooden water wheel, long utilized for driving machinery in flour mills and fa...

Segura

(Encyclopedia)Segura sāgo͞oˈrä [key], river, c.200 mi (320 km) long, rising on the northeastern slopes of the Sierra de Segura, SE Spain, and flowing generally E into the Mediterranean Sea. It is used for hydro...

aqueduct

(Encyclopedia)aqueduct ăkˈwədŭkt [key] [Lat.,=conveyor of water], channel or trough built to convey water, chiefly for providing a densely populated region with a supply of freshwater. The flow in aqueducts is ...

Charles III, king of Spain, and of Naples and Sicily

(Encyclopedia)Charles III, 1716–88, king of Spain (1759–88) and of Naples and Sicily (1735–59), son of Philip V and Elizabeth Farnese. Recognized as duke of Parma and Piacenza in 1731, he relinquished the duc...

Theremin, Leon

(Encyclopedia)Theremin, Leon thĕrˈəmən [key], 1896–1993, Russian engineer and inventor, b. St. Petersburg as Lev Sergeyevich Termen. He studied and worked in his native city, attending its university and cons...

Bellini, Vincenzo

(Encyclopedia)Bellini, Vincenzo vēnchānˈtsō bĕl-lēˈnē [key], 1801–35, Italian opera composer. He acquired his musical training from his grandfather and father, and began composing religious and secular mu...

Kotzebue

(Encyclopedia)Kotzebue kŏtˈsəbyo͞o [key], city (1990 pop. 2,751), NW Alaska, on Kotzebue Sound at the tip of Baldwin Peninsula; inc. 1958. It has one of the largest settlements of Eskimos in Alaska. Kotzebue is...