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Roebuck, John

(Encyclopedia)Roebuck, John, 1718–94, English physician, chemist, and inventor. He acted as a chemical consultant to local industries in Birmingham and invented the lead chamber process of manufacturing sulfuric ...

Rolfe, John

(Encyclopedia)Rolfe, John rŏlf [key], 1585–1622, English colonist in Virginia. He reached the colony in May, 1610, and introduced (1612) the regular cultivation of tobacco, which became Virginia's staple. A wido...

Rolph, John

(Encyclopedia)Rolph, John rŏlf [key], 1793–1870, Canadian physician and politician, b. England. He studied law and medicine in England and served in the Legislative Assembly of Upper Canada (1824–30, 1836–37...

Tulloch, John

(Encyclopedia)Tulloch, John tŭlˈəkh, –ək [key], 1823–86, Scottish liberal theologian and educator. Ordained (1845) into the Church of Scotland, he was a parish minister until 1854, when he became principal ...

Tyler, John

(Encyclopedia)Tyler, John, 1790–1862, 10th President of the United States, b. Charles City co., Va. Tyler, nominated by a small Democratic faction, had withdrawn from the 1844 election. In Feb., 1861, he pres...

Tyndall, John

(Encyclopedia)Tyndall, John tĭnˈdəl [key], 1820–93, British physicist, b. Ireland. He became (1853) professor of natural philosophy at the Royal Institution and in 1867 succeeded Michael Faraday, his friend an...

Udall, John

(Encyclopedia)Udall, Udal yo͞oˈdəl, yo͞ovˈdāl [key], 1560?–1592, English clergyman, educated at Cambridge. He adopted Puritan sympathies and aided John Penry in issuing the anticlerical pamphlets published ...

Whitgift, John

(Encyclopedia)Whitgift, John hwĭtˈgĭft [key], 1530?–1604, archbishop of Canterbury. He was a fellow of Peterhouse, Cambridge. As vice chancellor (1573) he had a leading part in revising the university statutes...