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Arkansas, river, United States

(Encyclopedia)Arkansas ärkănˈzəs, ärˈkənsôˌ [key], river, c.1,450 mi (2,330 km) long, rising in the Rocky Mts., central Colo., and flowing generally SE across the plains to the Mississippi River, SE Ark.; ...

Ohio, river, United States

(Encyclopedia)Ohio, river, 981 mi (1,579 km) long, formed by the confluence of the Allegheny and Monongahela rivers in SW Pa., at Pittsburgh; it flows northwest, then generally southwest to enter the Mississippi Ri...

United States Naval Observatory

(Encyclopedia)United States Naval Observatory, a federal astronomical observatory, located in Washington, D. C. It evolved from the Navy's oldest scientific institution, the Depot of Charts and Instruments, founded...

Rhode Island, state, United States

(Encyclopedia)CE5 Rhode Island, smallest state in the United States, located in New England; bounded by Massachusetts (N and E), the Atlantic Ocean (S), and Connecticut (W). Until well into the 20th cent. ...

Charleston, cities, United States

(Encyclopedia)Charleston. 1 City (2020 pop. 17,286), seat of Coles co., E Ill.; inc. 1835. Charleston is an industrial, rail, and trade center located in an ...

United States National Science Foundation

(Encyclopedia)United States National Science Foundation: see National Science Foundation. ...

Illinois, state, United States

(Encyclopedia)CE5 Illinois, midwestern state in the N central United States. It is bordered by Lake Michigan and Indiana (E); Kentucky, across the Ohio River (SE); Missouri and Iowa, across the Mississippi River...

United States–Mexico–Canada Agreement

(Encyclopedia)United States–Mexico–Canada Agreement: see North American Free Trade Agreement. ...

United States Merchant Marine Academy

(Encyclopedia)United States Merchant Marine Academy, at Kings Point, N.Y.; for the training of merchant marine officers; established 1936, opened 1943. The academy became coeducational in 1974. Candidates must be b...

Wisconsin, state, United States

(Encyclopedia)CE5 Wisconsin wĭskŏnˈsən, –sĭn [key], upper midwestern state of the United States. It is bounded by Lake Superior and the Upper Peninsula of Michigan, from which it is divided in part by the...