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seafloor spreading

(Encyclopedia)CE5 Schematic model of the oceanic crust, showing seafloor spreading seafloor spreading, theory of lithospheric evolution that holds that the ocean floors are spreading outward from vast underwate...

Langdon, John

(Encyclopedia)Langdon, John, 1741–1819, American political leader, b. Portsmouth, N.H. A prosperous merchant, Langdon was active in pre-Revolutionary activities. In 1775 he became a delegate to the Continental Co...

Lansing, John

(Encyclopedia)Lansing, John, 1754–1829?, American political leader and jurist, b. Albany, N.Y. He served as military secretary to Gen. Philip J. Schuyler in the American Revolution and later became a prominent la...

Lee, William

(Encyclopedia)Lee, William, 1739–95, American Revolutionary diplomat, b. Westmoreland co., Va.; brother of Arthur Lee, Francis L. Lee, and Richard H. Lee. He opened a business house in London in 1768 and later wa...

McDougall, Alexander

(Encyclopedia)McDougall, Alexander məkdo͞oˈgəl [key], 1731–86, American Revolutionary political leader and general, b. Islay, Inner Hebrides, Scotland. He was taken (1738) as a child to New York. He became a ...

Mansfield, William Murray, 1st earl of

(Encyclopedia)Mansfield, William Murray, 1st earl of, 1705–93, English jurist. As solicitor general (1742–54) he prosecuted the Scottish rebel lords, Balmerino (Arthur Elphinstone), Kilmarnock, and Lovat. In 17...

Alexander, William

(Encyclopedia)Alexander, William, known as Lord Stirling stûrˈlĭng [key], 1726–83, American Revolutionary general, b. New York City. Although the House of Lords rejected his claim to succeed as the 6th earl of...

Grasse, François Joseph Paul, comte de

(Encyclopedia)Grasse, François Joseph Paul, comte de fräNswäˈ zhôzĕfˈ pōl kôNt də gräs [key], 1722–88, French admiral. In 1781, in command of a French fleet sent to cooperate with the Continental force...

U , letter of the alphabet

(Encyclopedia)U, 21st letter of the alphabet, corresponding to the Greek upsilon [Gr.,=u without the aspirate]. Until the late Middle Ages the capital was V, the minuscule u, no distinction being made between the c...

Baldwin, Abraham

(Encyclopedia)Baldwin, Abraham, 1754–1807, American political leader, b. Guilford, Conn. After serving as a chaplain in the American Revolution, he studied law and in 1784 was admitted to practice in Georgia. He ...