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marine engine

(Encyclopedia)marine engine, machine for the propulsion of watercraft. The earliest marine power plants, reciprocating steam engines, were used almost exclusively until the early 1900s. In later ship construction t...

Hirst, Damien Steven

(Encyclopedia)Hirst, Damien Steven, 1965–, British artist-provacateur, b. Bristol. While at Goldsmiths College, London (grad. 1988), he organized the exhibition Freeze, whose participants, led by Hirst, became kn...

gyroscope

(Encyclopedia)CE5 Three-frame gyroscope gyroscope jīˈrəskōpˌ [key], symmetrical mass, usually a wheel, mounted so that it can spin about an axis in any direction. When spinning, the gyroscope has special p...

Andaman and Nicobar Islands

(Encyclopedia)Andaman and Nicobar Islands ănˈdəmən, nĭkˈōbär [key], union territory (2001 provisional pop. 356,265), India, in the Bay of Bengal. Port Blair, in the Andamans, is...

genealogy

(Encyclopedia)genealogy jēˌnēŏlˈəjē, –ălˈ–, jĕ– [key], the study of family lineage. Genealogies have existed since ancient times. Family lineage was originally transmitted through oral tradition and...

Frobisher, Sir Martin

(Encyclopedia)Frobisher, Sir Martin frōˈbĭshər [key], 1535?–1594, English mariner. He went to sea as a boy, and spent much of his youth in the African trade. He later gained the friendship of Sir Humphrey Gil...

snorkel

(Encyclopedia)snorkel, tube through which a submarine or diver can draw air while underwater. When in use, the top of the snorkel tube extends above the water surface into the air. The first snorkels were probably ...

Saint Helena

(Encyclopedia)Saint Helena həlēˈnə [key], island, 47 sq mi (122 sq km), in the S Atlantic Ocean, 1,200 mi (1,931 km) W of Africa. Together with the islands of Ascension and Tristan da Cunha, it comprises the Br...

Salem, cities, United States

(Encyclopedia)Salem. 1 City (1990 pop. 38,091), seat of Essex co., NE Mass., on an inlet of Massachusetts Bay; inc. 1629. Its once famous harbor has silted up. Salem has electronic, leather, and machinery industrie...

Opium Wars

(Encyclopedia)Opium Wars, 1839–42 and 1856–60, two wars between China and Western countries that marked the shift of wealth and power from East to West. The first was between Great Britain and China. Early in t...