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Potomac

(Encyclopedia)Potomac pətōˈmək [key], river, 285 mi (459 km) long, formed SE of Cumberland, Md., by the confluence of its North and South branches and flowing generally SE to Chesapeake Bay. It forms part of th...

Ohio Company

(Encyclopedia)Ohio Company, organization formed (1747) to extend settlements of Virginia westward. The members were mostly Virginia planters interested in land speculation and the fur trade. A royal charter (1749) ...

Ohio University

(Encyclopedia)Ohio University, main campus at Athens; state supported; coeducational; chartered 1804, opened 1809 as the first college in the Old Northwest. There are additional campuses at Chiillicothe, Lancaster,...

Baltimore & Ohio Railroad

(Encyclopedia)Baltimore & Ohio Railroad (B&O), first U.S. public railroad, chartered in 1827 by a group of Baltimore businessmen to regain trans-Allegheny traffic lost to the newly opened Erie Canal. Constr...

Chesapeake, city, United States

(Encyclopedia)Chesapeake chĕsˈəpēkˌ [key], city (2020 pop. 249,422), formed independently by the merging of ...

Intracoastal Waterway

(Encyclopedia)Intracoastal Waterway, c.3,000 mi (4,827 km) long, partly natural, partly artificial, providing sheltered passage for commercial and leisure boats along the U.S. Atlantic coast from Boston, Mass. to K...

Chicago Sanitary and Ship Canal

(Encyclopedia)Chicago Sanitary and Ship Canal: see Chicago, river. ...

Chesapeake Bay retriever

(Encyclopedia)Chesapeake Bay retriever, breed of large sporting dog developed in the United States. It stands about 24 in. (61 cm) high at the shoulder and weighs about 65 lb (29.5 kg). Its thick, short double coat...

Midland Canal

(Encyclopedia)Midland Canal, Ger. Mittelland Kanal, artificial waterway system of Germany, extending eastward c.200 mi (320 km) along the North German plain from the Dortmund-Ems Canal, Germany, to Magdeburg, Germa...

lock, canal

(Encyclopedia)lock, canal, stretch of water enclosed by gates, one at each end, built into a canal or river for the purpose of raising or lowering a vessel from one water level to another. A lock may also be built ...