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echo sounder

(Encyclopedia)echo sounder, an older instrumentation system for indirectly determining ocean floor depth. Echo sounding is based on the principle that water is an excellent medium for the transmission of sound wave...

Fairfax of Cameron, Thomas Fairfax, 6th Baron

(Encyclopedia)Fairfax of Cameron, Thomas Fairfax, 6th Baron, 1693–1781, proprietor of the Northern Neck of Virginia, b. England. He inherited the Northern Neck, comprising the land between the Rappahannock and Po...

Prince, Thomas, 1687–1758, American clergyman, scholar, and historian

(Encyclopedia)Prince, Thomas, 1687–1758, American clergyman, scholar, and historian, b. Sandwich, Mass., grad. Harvard, 1709. From 1709 to 1717 he was abroad; he studied in London and preached at a Congregational...

Strafford, Thomas Wentworth, 1st earl of

(Encyclopedia)Strafford, Thomas Wentworth, 1st earl of, 1593–1641, English statesman. Regularly elected to Parliament from 1614 on, he became one of the critics of George Villiers, 1st duke of Buckingham, and of ...

slang

(Encyclopedia)slang, vernacular vocabulary not generally acceptable in formal usage. It is notable for its liveliness, humor, emphasis, brevity, novelty, and exaggeration. Most slang is faddish and ephemeral, but s...

verdigris

(Encyclopedia)verdigris vûrˈdəgrēsˌ [key], one of three copper acetates: blue verdigris, Cu(CH3COO)2·CuO·6H2O; green verdigris, 2Cu(CH3COO)2·CuO·6H2O; or neutral verdigris, Cu(CH3COO)2·H2O; or a mixture o...

apatite

(Encyclopedia)apatite ăpˈətīt [key], mineral, a phosphate of calcium containing chlorine or fluorine, or both, that is transparent to opaque in shades of green, brown, yellow, white, red, and purple. Apatite is...

Lambeau, Earl Louis

(Encyclopedia)Lambeau, Earl Louis, 1898–1965, American football coach and player, b. Green Bay, Wis. “Curly” Lambeau briefly attended Notre Dame, where he played for Knute Rockne, but illness forced his retur...

flame test

(Encyclopedia)flame test, test used in the identification of certain metals. It is based on the observation that light emitted by any element gives a unique spectrum when passed through a spectroscope. When a salt ...

Champlain, Lake

(Encyclopedia)Champlain, Lake, 490 sq mi (1,269 sq km), 125 mi (201 km) long and from 0.5 to 14 mi (0.8–23 km) wide, forming part of the New York–Vermont border and extending into Quebec. Lake Champlain lies in...