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Sevan

(Encyclopedia)Sevan syĭvänˈ [key], lake, c.540 sq mi (1,400 sq km), NE Armenia, at an altitude of 6,280 ft (1,914 m); it is 324 ft (99 m) deep. The largest lake of the Caucasus, it is fed by some 30 streams, but...

Gotthard Pass

(Encyclopedia)Gotthard Pass and Gotthard Tunnel: see Saint Gotthard, mountain group. ...

Andermatt

(Encyclopedia)Andermatt änˈdərmät [key], village, Uri canton, S central Switzerland. It is a road junction, health resort, and sports center. The St. Gotthard Tunnel runs beneath the village. Andermatt has a 12...

Birkenhead

(Encyclopedia)Birkenhead, city and port, Wirral metropolitan borough, W central England, at the mouth of the Mersey River; connected with Liverpool by the Mersey tunn...

information theory

(Encyclopedia)information theory or communication theory, mathematical theory formulated principally by the American scientist Claude E. Shannon to explain aspects and problems of information and communication. Whi...

Mont Blanc

(Encyclopedia)Mont Blanc môN bläN [key], Alpine massif, on the French-Italian border, SE of Geneva. One of its several peaks, also called Mont Blanc (15,771 ft/4,807 m), is the highest peak in France and the seco...

transistor

(Encyclopedia)CE5 Simple transistor circuit transistor, three-terminal, solid-state electronic device used for amplification and switching. It is the solid-state analog to the triode electron tube; the transist...

Irish Sea

(Encyclopedia)Irish Sea, arm of the Atlantic Ocean, c.40,000 sq mi (103,600 sq km), 130 mi (209 km) long and up to c.140 mi (230 km) wide, lying between Ireland and Great Britain. It is connected with the Atlantic ...

Kill Van Kull

(Encyclopedia)Kill Van Kull kĭl văn kŭl [key], channel, 4 mi (6.4 km) long and .5 mi (.8 km) wide, connecting Upper New York Bay with Newark Bay, between Bayonne, N.J., and Staten Island, N.Y. It is the main rou...

Baker, Sir Benjamin

(Encyclopedia)Baker, Sir Benjamin, 1840–1907, English civil engineer. He helped build London's underground railway, Tower Bridge, and the Blackwall Tunnel, and with Sir John Fowler he designed and built the bridg...