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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...

Kirkwall

(Encyclopedia)Kirkwall kûrkˈwôl, –wəl [key], town (1991 pop. 5,867), N Scotland, on the east coast of Mainland Island. It is the trading center and administrative seat of the Orkney Islands, with exports of e...

composite material

(Encyclopedia)composite material or composite, any material made from at least two discrete substances, such as concrete. Many materials are produced as composites, such as the fiberglass-reinforced plastics used f...

bark, sailing vessel

(Encyclopedia)bark or barque both: bärk [key], sailing vessel with three masts, of which the mainmast and the foremast are square-rigged while the mizzenmast is fore-and-aft-rigged. Although the word was once used...

Rainbow Bridge National Monument

(Encyclopedia)Rainbow Bridge National Monument, 160 acres (65 hectares), S Utah; est. 1910. Rainbow Bridge, the largest natural bridge in the world, is a symmetrical, pink, sandstone arch, 309 ft (94 m) high, 33 ft...

Nau, Jacques Jean David

(Encyclopedia)Nau, Jacques Jean David zhäk zhäN dävēdˈ nō [key], c.1630–1671, French pirate in the West Indies. He is also called François L'Olonnois. He went to the West Indies in 1650. Expelled in 1653 f...

De Long, George Washington

(Encyclopedia)De Long, George Washington də lôngˈ [key], 1844–81, American arctic explorer, b. New York City, grad. Annapolis, 1865. In 1873 he was assigned to the Juniata, which was sent to the arctic to sear...

ark

(Encyclopedia)ark, in the Bible. 1 Boat of Noah, which he built at God's command to preserve his family and certain creatures from the Deluge. 2 Ark of the Covenant, the sacred wooden chest of the Hebrews, represen...

Morrison, Scott

(Encyclopedia)Morrison, Scott, 1968–, Australian political leader, b. Sydney. Morrison was head of tourism for both New Zealand and Australia before he became state director (2000–2004) of the Liberal party in ...

Cuyahoga Valley National Park

(Encyclopedia)Cuyahoga Valley National Park kīˌəhōˈgə [key], 32,950 acres (13,334 hectares), in the Cuyahoga River valley between Akron and Cleveland, NE Ohio; est. as a national recreation area 1974, designa...