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Oruro

(Encyclopedia)Oruro ōro͞oˈrō [key], city (1992 pop. 183,422), capital of Oruro dept., W Bolivia. It is Bolivia's railroad center. Oruro's economy is based on exploitation of the region's tin, tungsten, and copp...

Du Pont, Pierre Samuel

(Encyclopedia)Du Pont, Pierre Samuel, 1870–1954, American industrialist, b. Wilmington, Del., grad. Massachusetts Institute of Technology, 1890. Du Pont worked as a chemist with the family's company, helping to d...

commonwealth

(Encyclopedia)commonwealth, form of administration signifying government by the common consent of the people. To Locke and Hobbes and other 17th-century writers the term meant an organized political community simil...

china clay

(Encyclopedia)china clay, one of the purest of the clays, composed chiefly of the mineral kaolinite usually formed when granite is changed by hydrothermal metamorphism. Usage of the terms china clay and kaolin is n...

Erie, indigenous people of North America

(Encyclopedia)Erie ĭrˈē [key], indigenous people of North America of the Iroquoian branch of the Hokan-Siouan linguistic stock (see Native American languages). In the Iroquoian language the word erie means “lo...

Greensburg

(Encyclopedia)Greensburg. 1 City (2020 pop. 14,976), seat of Westmoreland co., SW Pa.; settled c.1770, inc. as a city 1928. Located in a coal area, the city ...

Gould, George Jay

(Encyclopedia)Gould, George Jay go͞old [key], 1864–1923, U.S. railroad owner, b. New York City; son of Jay Gould. He was associated with his father, inherited all the holdings on Jay Gould's death, and adopted d...

Gibson, John, American frontiersman

(Encyclopedia)Gibson, John, 1740–1822, American frontiersman, b. Lancaster, Pa. After taking part in the capture (1758) of Fort Duquesne (renamed Fort Pitt) in the French and Indian War, he became a trader with t...

Murray, Philip

(Encyclopedia)Murray, Philip, 1886–1952, American labor leader, b. Blantyre, Scotland. He emigrated to the United States in 1902 and worked in the Pennsylvania coal mines. After he was discharged for fighting wit...

Kelley, William Darrah

(Encyclopedia)Kelley, William Darrah dârˈə [key], 1814–90, American legislator, b. Philadelphia. He was admitted (1841) to the bar and served (1847–56) as judge of the court of common pleas for Philadelphia....