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Redmond, John Edward

(Encyclopedia)Redmond, John Edward, 1856–1918, Irish nationalist leader. He was elected to Parliament as a Home Rule member in 1881 at the height of the obstructionist program of Charles Parnell. When the Irish n...

Ten Years War

(Encyclopedia)Ten Years War, 1868–78, struggle for Cuban independence from Spain. Discontent was caused in Cuba by excessive taxation, trade restrictions, and virtual exclusion of native Cubans from governmental ...

Whitefield, George

(Encyclopedia)Whitefield, George, 1714–70, English evangelistic preacher, leader of the Calvinistic Methodist Church. At Oxford, which he entered in 1732, he joined the Methodist group led by John Wesley and Char...

Hamilton, Sir William Rowan

(Encyclopedia)Hamilton, Sir William Rowan, 1805–65, Irish mathematician and astronomer, b. Dublin. A child prodigy, he had mastered 13 languages by the age of 13 and was still an undergraduate when he became prof...

Davidson, Donald Herbert

(Encyclopedia)Davidson, Donald Herbert, 1917–2003, American philosopher, b. Springfield, Mass., grad. Harvard (B.A., 1939; Ph.D., 1949). A student of W. V. Quine, Davidson emerged as one of the major figures in p...

Proclus

(Encyclopedia)Proclus prōˈkləs [key], 410?–485, Neoplatonic philosopher, b. Constantinople. He studied at Alexandria and at Athens, where he was a pupil of the Platonist Syrianus, whom he succeeded as a teache...

threshing

(Encyclopedia)threshing or thrashing, separation of grain from the stalk on which it grows and from the chaff or pod that covers it. The first known method was by striking the reaped ears of grain with a flail. In ...

rectifier

(Encyclopedia)rectifier, component of an electric circuit used to change alternating current to direct current. Rectifiers are made in various forms, all operating on the principle that current passes through them ...

Nicol prism

(Encyclopedia)Nicol prism nĭkˈəl [key], optical device invented (1828) by William Nicol of Edinburgh. It consists essentially of a crystal of calcite, or Iceland spar, that is cut at an angle into two equal piec...

Summerhill

(Encyclopedia)Summerhill, radical progressive school in Leiston, Suffolk, England, and the educational movement based on principles developed at the school. The school was founded (1924) by A. S. Neill, who headed ...