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Harriet Tubman Underground Railroad National Historical Park
(Encyclopedia) Harriet Tubman Underground Railroad National Historical Park: see National Parks and Monuments (table)national parks and monuments (table).septic tank
(Encyclopedia) septic tank, underground sedimentation tank in which sewage is retained for a short period while it is decomposed and purified by bacterial action. The organic matter in the sewage…Ohrid, Lake
(Encyclopedia) Ohrid, Lake, Albanian Ohrit, deepest lake of the Balkans, c.130 sq mi (340 sq km), on the North Macedonia–Albania border. It is connected with Lake Prespa by underground channels and…adit
(Encyclopedia) aditaditădˈĭt [key], in mining, underground passage excavated nearly horizontally, with one end open to the earth's surface, usually used to service a mine. The adit end is the…White Sulphur Springs
(Encyclopedia) White Sulphur Springs, city (1990 pop. 2,779), Greenbrier co., SE W.Va., in the Allegheny Mts. near the Virginia border; settled c.1750. A mineral springs health resort since early…Plainview
(Encyclopedia) Plainview. 1 Uninc. city (1990 pop. 26,207), Nassau co., SE N.Y., on Long Island. It is chiefly residential. 2 City (1990 pop. 21,700), seat of Hale co., NW Tex., on the Llano Estacado…drainage, in mining
(Encyclopedia) drainage, in mining, removal of water seeping into shafts and other underground mine workings from the surrounding ground. Unless seeping water is removed continually, it may endanger…Garrett, Thomas
(Encyclopedia) Garrett, Thomas, 1789–1871, American abolitionist, b. Upper Darby, Pa. A Quaker, he joined the Pennsylvania Abolition Society in 1818. At Wilmington, Del., where he became a hardware…coal mining
(Encyclopedia) coal mining, physical extraction of coal resources to yield coal; also, the business of exploring for, developing, mining, and transporting coal in any form. Coal has been historically…Pluto, in Greek religion and mythology
(Encyclopedia) Pluto, in Greek religion and mythology, god of the underworld, son of Kronos and Rhea; also called Hades. After the fall of the Titans, Pluto and his brothers Zeus and Poseidon divided…Trending
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