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52 DaboU's " New Arithmetic," and compiled the "New England Almanac" from his father's death in 1818 until his own death. — David Austin, son of the second Nathan, b. in Groton, Conn., in 1813; d. there, 8 July, 1805, sat continuously in the state house of representatives from 184G till 1871, and then served a term in the senate. He assisted his father in the preparation of the " New Arithmetic," and alter his father's death continued the publi- cation of the almanac. — Another son, Celadon Leeds, inventor, b. in Centre Groton, Conn., 18 July, 1818 ; d. in New London, Conn., 13 Oct., 186G, was a merchant in New London, and from 1854 till 18C1 was employed in the interior de- partment at Washington, He conceived the idea of applying the principle of the clarionet to a large trumpet, to serve as a fog signal for mariners. — Another grandson of Nathan, Cliarles Miner, in- ventor, b. in Groton, Conn., 14 Oct., 1823, was trained as a practical mechanic in the works of the Wilson manufacturing company. New London, of which he rose to be superintendent. He is the in- ventor of the cast-iron bell-bottom jack-screw bar- rel, now in general use throughout the world, for raising buildings and other massive objects, and of a lathe for cutting the thread of jack-screws, which has been in successful operation for twenty-five years, as has also his oval slide parallel bench-vise. He has invented also a breast-drill, a self-centring brace for bits, a mowing-machine, and the DaboU bushing. He developed his cousin's suggestion of a steam fog-trumpet, consisting of a steel reed vi- brating within a horn, using a hot-air engine to force cold air by means of an air-pump into a boiler, from which it escapes into the horn through a valve, causing the vibrations of the reed, which are regulated by an automatic cam. He has held various local offices, and in recent years that of U. S. goA^ernment inspector, for Connecticut and Rhode Island, of boilers on steam vessels.

DABOUR, John, artist, b. in Smyrna, Asia, in 1837. He was a pupil at the Academy of fine arts in Paris, and studied also at the Art museum of B^rance. Fifteen years of' his professional life were spent m the United States, painting portraits, which are to be found in the principal cities of the country, but chiefly in Baltimore. Among the more prominent of those that have been sitters in his studio are Archbishop Spaulding, of Baltimore ; Archbishop Purcell, of Cincinnati ; Senator Cam- eron, of Pennsylvania, and his son; Senator Davis, of Virginia; and Gov. Groome, of Maryland.

DACIAN, Jakob (dah-see-an'), Danish monk, b. in Copenhagen in 1496 ; d. in Tarecuato, Mexico, in 1562. He belonged to the Danish royal family, became a Franciscan at the age of twenty-four, and was appointed provincial of his order in 1529. A few years afterward he had to leave his country to escape persecution by the Lutherans, and went to Spain, where the emperor, Charles V., recommend- ed him to the civil and church authorities of New Spain. Dacian at once left for Mexico, and there filled important offices in his order, and for many years worked most successfully as a missionary a,mong the Indians, especially in the provinces of Santo Evangelio, Miehoacan, and Guadalajara. He preached to the natives in their Tarase lan- guage, which he mastered, as well as Spanish, Latin, Greek, Hebrew, and Arabic. While he was guardian of the Tarecuato convent he founded the town of Arancara. Dacian left manv works in various languages, most of which have" been lost. The best known is his " Declamacion del pueblo bfirbaro de los Indios, que habiendo recibido el bautismo, desean recibir los demas sacramentos."

DA COSTA, Jacob Mendes, phvsician, b. in St. Thomas, West Indies, 7 Feb., 1833. His lit- erary and classical education was received in Ger- many, his medical in Jefferson college. Philadel- phia, where he was graduated in 1852, and in the hospitals and schools of Paris and Vienna, where he passed two years. In 1854 he returned to Philadelphia, established himself there in prac- tice, and made a special study of diseases of the heart and lungs. In 1864 he was appointed lec- turer on clinical medicine in Jefferson medical col- lege, and in the spring of 1872 was chosen profes- sor of the theory and practice of medicine in the same institution. His contributions to medical literature include " Epithelial Tumors and Cancers of the Skin " (185?) ; " An Inquiry into the Patho- logical Anatomy of Acute Pneumonia " (1855) ; " The Physicians of the Last Century " (1857) ; " On Serous Apoplexy " (1859) ; " Medical Diagnosis, with Special Reference to Practical Medicine" (1864) ; and " Inhalation in the Treatment of Dis- eases of the Respiratoiy Passages " (1867). He has also contributed many articles to the " Pennsyl- vania Hospital Reports," in the " American Journal of the Medical Sciences." and his clinical lectures have appeared in the " Medical and Surgical Re- porter " and the " Philadelphia Medical Times."

DACRES, James Richard, British naval officer, b. in Lowestoft, Suffolk. England, 22 Aug., 1788 ; d. at his country-seat in Hampshire, 3 Dec, 1853. His father was Vice-Admiral Dacres, who in the Revolutionary war commanded the " Carle- ton," which engaged Gen. Arnold's flotilla on Lake Champlain in 1776. He entered the navy in 1796 as a first-class volunteer on board the " Serapis," commanded by his father, with whom he also served on the " Barfleur " in 1797. He afterward accompanied the expedition against Ferrol, in Au- gust, 1800, and was present, in the '' Boadicea," in the action with the French ship " Duguay Trouin," in Avigust, 1803. He received his first commission 15 Nov., 1804, and on 5 July, 1805, was given com- mand of the sloop " Elk," from which he was transferred. 14 Jan., 1806, to the " Bacchante." On 14 Feb., 1807, he captured the French schooner " Dauphin," and after other distinguished services returned to England m December, 1807. On 16 March, 1811. he was assigned to the command of the " Guerriere," and participated in the pursuit of the " Constitution," having previously had his ves- sel's name vauntingiy printed in large letters on her foretopsail, and inquired of every ship he met for the " President," intimating that he would chastise her for the punishment she had given the " Little Belt." After the loss of the " Guerriere " he was transferred to the '• Constitution," and was put on shore, on parole, at Boston, on 31 Aug., 1813. By the court-martial that, on 6 October fol- lowing, assembled on board the " Africa," at Hali- fax, to try Capt. Dacres for suiTendering his ship to the enemy, he was honorably acquitted of all blame for her loss. While in command of the " Tiber " he took, on 8 March, 1815, the American privateer "Leo." He was on duty on the New- foundland and Channel stations from 1833 till 1837. He attained flag rank 28 June, 1838, and in 1845 was appointed commander-in-chief at the Cape of Good Hope. See Gen. Jas. Grant Wilson's address on " Commodore Isaac Hull and the Frig- ate Constitution " (New York, 1880).

DADD, George H., veterinary surgeon, b. about 1813. He was a native of England, but removed to the United States in 1839. He turned his attention to the diseases of the brute creation, and became a successful practitioner. He pub-