Columbia Encyclopedia

(Encyclopedia) flint clay: see fire 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...

(Encyclopedia) Clay, Lucius DuBignon dəbĭnˈyən, dübēnyôNˈ [key], 1897–1978, American general, b. Marietta, Ga. A graduate of West Point and an engineering officer, he held many army administrative posts an...

(Encyclopedia) boulder clay: see drift.

(Encyclopedia) clay pan: see hardpan.

(Encyclopedia) Clay, Clement Claiborne, 1816–82, U.S. Senator (1853–61), b. Huntsville, Ala. A legislator and then a judge in his native state, he was twice elected to the U.S. Senate and became an ardent defend...

(Encyclopedia) Clay, Cassius Marcellus, 1810–1903, American politician and diplomat, b. Madison co., Ky. Although he came from a slaveholding family, Clay early came to abhor the institution of slavery. In 1845 he...

(Encyclopedia) Harrison, William Henry, 1773–1841, 9th President of the United States (Mar. 4–Apr. 4, 1841), b. “Berkeley,” Charles City co., Va.; son of Benjamin Harrison (1726?–1791) and grandfather of B...

(Encyclopedia) Moore, Henry, 1898–1986, English sculptor. Moore's early sculpture was angular and rough, strongly influenced by pre-Columbian art. About 1928 he evolved a more personal style which has gained him a...

(Encyclopedia) Clay, Cassius Marcellus, Jr.: see Ali, Muhammad. ...