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Ziegler, Karl

(Encyclopedia)Ziegler, Karl tsēˈglər [key], 1898–1973, German chemist. Educated at the Univ. of Marburg, he taught at Heidelberg and Halle and for a short period at the Univ. of Chicago. He became director of ...

Roscommon, county, Republic of Ireland

(Encyclopedia)Roscommon rŏskŏmˈən [key], county (1991 pop. 51,876), 951 sq mi (2,463 sq km), central Republic of Ireland. The county seat is Roscommon. A part of the central plain of Ireland, the region is low-...

silicosis

(Encyclopedia)silicosis sĭlĭkōˈsĭs [key], occupational disease of the lungs caused by inhalation of free silica (quartz) dust over a prolonged period of time. Free silica is dispersed in the air and inhaled by...

Still, William

(Encyclopedia)Still, William, 1821–1902, American abolitionist, b. Burlington co., N.J. After he moved to Philadelphia (1844), he began working for the Pennsylvania Anti-Slavery Society (1847) and became head of ...

Hokkaido

(Encyclopedia)Hokkaido hōkīˈdō [key], island, c.30,130 sq mi (78,040 sq km), N Japan, separated from Ho...

lighthouse

(Encyclopedia)lighthouse, towerlike structure erected to give guidance and warning to ships and aircraft by either visible or radioelectrical means. Lighthouses were long built to conform in structure to their geog...

Khakass Republic

(Encyclopedia)Khakass Republic khəkäsˈēə [key], constituent republic (1990 est. pop. 573,000) 23,900 sq mi (61,900 sq km), S central Siberian Russia, in Krasnoyarsk Territory. Abakan (the capital) and Chernogo...

United Mine Workers of America

(Encyclopedia)United Mine Workers of America (UMW), international labor union formed (1890) by the amalgamation of the National Progressive Union (organized 1888) and the mine locals under the Knights of Labor. It ...

fuel

(Encyclopedia)fuel, material that can be burned or otherwise consumed to produce heat. The common fuels used in industry, transportation, and the home are burned in air. The carbon and hydrogen in fuel rapidly comb...

Cumberland, river, United States

(Encyclopedia)Cumberland, river, 687 mi (1,106 km) long, rising in E Ky., and winding generally SW through Ky. and Tenn., then NW to the Ohio River near Paducah, Ky.; drains c.18,500 sq mi (47,910 sq km). The devel...