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rock salt

(Encyclopedia) rock salt: see sodium chloride.

Rock Springs

(Encyclopedia) Rock Springs, city (1990 pop. 19,050), alt. c.6,270 ft (1,910 m), Sweetwater co., SW Wyo., on Bitter Creek; inc. 1888. It is a cattle and sheep shipping point and the center of large…

Fort Duquesne

(Encyclopedia) Fort DuquesneFort Duquesnedəkānˈ, d&oomacr;– [key], at the junction of the Monongahela and Allegheny rivers, on the site of Pittsburgh, SW Pa. Because of its strategic location, it…

Rock Island, city, United States

(Encyclopedia) Rock Island, city (1990 pop. 40,552), seat of Rock Island co., NW Ill., on the Mississippi and Rock rivers, adjacent to Moline and opposite Davenport, Iowa; inc. 1841. These three…

Fort Beauséjour

(Encyclopedia) Fort BeauséjourFort Beauséjourbōsāzh&oomacr;rˈ [key], N.B., Canada, near Amherst, N.S. Built by the French between 1751 and 1755 to command Chignecto isthmus between Nova Scotia…

Fort Nassau

(Encyclopedia) Fort Nassau. 1 Built (1614) on Castle Island, in the Hudson River, S of Albany, N.Y. The fort served as a trading post for the Dutch until 1617, when it was destroyed by flood and…

metamorphism

(Encyclopedia) metamorphism, in geology, process of change in the structure, texture, or composition of rocks caused by agents of heat, deforming pressure, shearing stress, hot, chemically active…

The Journals of Lewis & Clark: June 4, 1804

by Meriwether Lewis and William Clark June 3, 1804June 5, 1804June 4, 1804 June 4th 1804 Monday, a fair Day Sent out 3 hunters, our mast broke by the boat running under a tree Passed…