(Encyclopedia) jack, mechanical device used to multiply a relatively small applied force so that it can lift and support heavy loads, or sometimes, move massive objects into a desired position. The…
(Encyclopedia) Jack Russell terrier, breed of dog developed in the 19th cent. by an English clergyman, the Rev. John (Parson Jack) Russell, 1795–1883, for hunting. The Jack Russell resembles the fox…
(Encyclopedia) Jack the Ripper, name given to an unidentified late-19th-century murderer in London, England; also known as the Whitechapel Murderer and Leather Apron. From Aug. to Nov., 1888, he was…
(Encyclopedia) Nicklaus, Jack William, 1940–, American golfer, b. Columbus, Ohio. He began playing golf at the age of 10 and before becoming a professional in late 1961 was considered by many the…
(Encyclopedia) Keats, Ezra Jack, 1916–83, American author and illustrator of children's books, b. Brooklyn, N.Y., as Jacob Ezra Katz. During the Great Depression, he painted murals for the Works…
(Encyclopedia) Kemp, Jack French, 1935–2009, American politician and government official, b. Los Angeles. He played football while at Occidental College (grad. 1957) and was a professional…
(Encyclopedia) Szostak, Jack William, 1952–, American molecular biologist, b. London, England, Ph.D. Cornell, 1977. Szostak has been a professor at Harvard Medical School and a researcher at…
(Encyclopedia) Yeats, Jack ButlerYeats, Jack Butleryāts [key], 1871–1957, Irish painter, son of the painter John Butler Yeats and brother of the poet William Butler Yeats. He began his career as an…
