TILLINGHAST, Nicholas, educator, born in Taunton, Massachusetts, 22 September, 1804; died in Bridgewater, Massachusetts, 10 April, 1856. He was the son of Nicholas Tillinghast, who was several times representative to the general court of Massachusetts between 1795 and 1816. The son was graduated at the United States military academy in 1824, and entering the United States army as 2d lieutenant in the 7th infantry, served for two years on garrison duty at Fort Gibson in the Indian territory. Afterward he returned to the military academy, where, in 1827-'34 he was successively assistant professor of chemistry, mineralogy, and geology, and of geography, history, and ethics, lie was promoted captain on 1 June, 1835, and joined his regiment at Fort Gibson, but resigned on 31 July, 1836. Captain Tillinghast then settled in Boston, where he received pupils in mathematics. In 1840 he was appointed principal of the state normal school at Bridgwater, and he continued to fill this post until failing health compelled his resignation in July, 1853. His only publications were " Elements of Plane Geometry" (Concord, New Hampshire, 1841) and " Prayers for Schools" (Boston, 1852).--His son, WILLIAM HOPKINS, born 20 March, 1854, was graduated at Harvard in 1877, and since 1882 has been an assistant in the library of Harvard university. He has published a translation, with additions, of Carl Ploetz's "Epitome of Ancient, Mediaeval, and Modern History" (Boston, 1884).