Columbia Encyclopedia

(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...

(Encyclopedia) Indio ĭnˈdē-ōˌ [key], city (2020 pop. 89,137), Riverside co., SE Calif., in the Coachella Valley of the Colorado...

(Encyclopedia) turquoise, hydrous phosphate of aluminum and copper, Al2(OH)3PO4·H2O+Cu, used as a gem. It occurs rarely in crystal form, but is usually cryptocrystalline. Turquoise is opaque and has a waxy luster; ...

(Encyclopedia) Rio Grande rēˈō grănd, rēˈō gränˈdē [key], river, c.1,885 mi (3,000 km) long, rising in SW Colo. in the San Juan Mts. and flowing south through the middle of N.Mex., past Albuquerque, then c...

(Encyclopedia) Ithaca ĭthˈəkə [key], city (2020 pop. 32,108), seat of Tompkins co., S central N.Y., at t...

(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...

(Encyclopedia) Aguascalientes äˌgwäskälyānˈtās, äˌwäs– [key] [Span.,=hot waters], state, 2,007 sq mi (5,200 sq km), central Mexico, on the Anáhuac plateau. Aguascali...

(Encyclopedia) Rush-Bagot Convention rŭsh-băgˈət [key], 1817, agreement between the United States and Great Britain concerning the Canadian border. It consisted of the exchange of notes signed by Richard Rush, A...

(Encyclopedia) Olympia, city (1990 pop. 33,840), state capital, and seat of Thurston co., W Wash., at the southern tip of Puget Sound, on Budd Inlet; inc. 1859. A port of entry, it ships lumber products and agricult...

(Encyclopedia) Reform party, in the United States, political party founded in 1995 by H. Ross Perot as an alternative to the Democratic and Republican parties. The Reform party's aims originally included mandating h...