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Adams, John Couch

(Encyclopedia)Adams, John Couch, 1819–92, English astronomer, grad. St. John's College, Cambridge, 1843. By mathematical calculation based on irregularities in the motion of Uranus, he predicted the position of t...

Service, Robert William

(Encyclopedia)Service, Robert William, 1874–1958, Canadian poet and novelist, b. England, educated at the Univ. of Glasgow. He went to Canada in 1897 and held odd jobs in British Columbia and at Whitehorse in the...

Poisson, Siméon Denis

(Encyclopedia)Poisson, Siméon Denis sēmāôNˈ dənēˈ pwäsôNˈ [key], 1781–1840, French mathematician and physicist. From 1802 he taught at the École polytechnique, Paris, and was also on the faculty of sc...

Ptolemy

(Encyclopedia)Ptolemy (Claudius Ptolemaeus), fl. 2d cent. a.d., celebrated Greco-Egyptian mathematician, astronomer, and geographer. He made his observations in Alexandria and was the last great astronomer of ancie...

Drayton, Michael

(Encyclopedia)Drayton, Michael, 1563–1631, English poet. The son of a prosperous tradesman, he received his educational training in the house of Sir Henry Goodere, where he served as page. There he made a lasting...

coronagraph

(Encyclopedia)coronagraph kərōˈnəgrăfˌ [key], device invented by the French astronomer B. Lyot (1931) for the purpose of observing the corona of the sun and solar prominences occurring in the chromosphere. Be...

happening

(Encyclopedia)happening, an artistic event of a theatrical nature, but usually improvised spontaneously without the framework of a plot. The term originated with the creation and performance in 1959 of Allan Kaprow...

Gregory, Lady Augusta

(Encyclopedia)Gregory, Lady Augusta (Isabella Augusta Persse), 1859–1932, Irish dramatist. Though she did not begin her writing career until middle-age, Lady Gregory soon became a vital force in the Irish drama. ...

Fry, Christopher

(Encyclopedia)Fry, Christopher, 1907–2005, English dramatist, b. Bristol as Christopher Fry Harris. Like his friend and mentor, T. S. Eliot, he was one of the few 20th-century dramatists to write successfully in ...

petrology

(Encyclopedia)petrology, branch of geology specifically concerned with the origin, composition, structure, and properties of rocks, primarily igneous and metamorphic, and secondarily sedimentary. It includes petrog...