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Thomson, Charles

(Encyclopedia)Thomson, Charles, 1729–1824, political leader in the American Revolution, b. Co. Londonderry (now Derry), Ireland. Emigrating to America in 1739, he later taught school and became a merchant. His pr...

paleomagnetism

(Encyclopedia)paleomagnetism, study of the intensity and orientation of the earth's magnetic field as preserved in the magnetic orientation of certain minerals found in rocks formed throughout geologic time. Paleom...

Pacific Ocean

(Encyclopedia)CE5 Pacific Ocean, largest and deepest ocean, c.70,000,000 sq mi (181,300,000 sq km), occupying about one third of the earth's surface; named by the explorer Ferdinand Magellan; the southern part i...

Gray, Robert

(Encyclopedia)Gray, Robert, 1755–1806, American sea captain, discoverer of the Columbia River, b. Tiverton, R.I. He probably served in the Continental navy in the American Revolution. In 1787 he and Capt. John Ke...

Gadsden, Christopher

(Encyclopedia)Gadsden, Christopher gădzˈdən [key], 1724–1805, American Revolutionary leader, b. Charleston, S.C., educated in England. He returned to Charleston (1746) and became a wealthy merchant. At the Sta...

Jones, Robert Edmond

(Encyclopedia)Jones, Robert Edmond, 1887–1954, American scene designer, b. Milton, N.H. With his design in 1915 for The Man Who Married a Dumb Wife, a new era of scene design began in the United States. His use o...

Newburgh

(Encyclopedia)Newburgh no͞oˈbərg, nyo͞oˈ– [key], city (1990 pop. 26,454), Orange co., SE N.Y., on the west bank of the Hudson River, opposite Beacon; settled 1709 by Palatine Germans, inc. 1800. The city has...

McHenry, James

(Encyclopedia)McHenry, James, 1753–1816, American political leader, b. Ireland. He emigrated to Philadelphia in 1771 and, after studying medicine under Benjamin Rush, served as a surgeon in the Continental Army i...

Paine, Robert Treat

(Encyclopedia)Paine, Robert Treat, 1731–1814, political figure in the American Revolution, signer of the Declaration of Independence, b. Boston, Mass. He served briefly as a chaplain in the French and Indian War ...

Ward, Artemas

(Encyclopedia)Ward, Artemas ärˈtĭməs [key], 1727–1800, American general in the American Revolution, b. Shrewsbury, Mass. He was active in colonial politics and served in the French and Indian War. As head of ...