Isaac Todhunter, an English mathematician, born in Rye in 1820. He graduated at Cambridge in 1848, and became mathematical lecturer at St. John's college. He has published a series of works on higher mathematics for college instruction, which enjoy great favor in England. The most important of his works on the philosophy and history of mathematics are the "History of the Progress of the Calculus of Variations during the 19th Century'" (1861), "Researches on the Calculus of Variations" (1872), and "History of the Mathematical Theories of Attraction and the Figure of the Earth, from the Time of Newton to that of Laplace" (2 vols., 1873).
Isaac William Wiley, an American clergyman, born in Lewistown, Pa., March 29, 1825. At the age of 18 he was licensed as a preacher of the Methodist Episcopal church, but on account of an injury of his voice he studied medicine, and graduated in the university of the city of New York in 1849. After practising his profession one year in Pennsylvania, he joined the Philadelphia conference, and was sent as medical missionary of the mission at Foochow, China. He returned to the United States in 1854, and was transferred to the Newark conference. In 1858 he was appointed president of the Pennington seminary and collegiate institute, New Jersey. He was editor of the "Ladies' Repository," Cincinnati, from 1864 to 1872, when he was elected bishop of the Methodist Episcopal church. He has published "The Fallen Missionaries of Fuh-chau "(New York, 1858).
Isaak Markus Jost, a German author, born in Bernburg, Feb. 22, 1793, died in Frankfort, Nov. 25, 1860. He studied at Gottingen and Berlin, was appointed teacher in the latter city in 1816, and in 1835 principal teacher of the Jewish Realschule in Frankfort, which post he held till his death. Of his numerous historical and other works, the best known are: Geschichte der Israeliten (9 vols., Berlin, 1820--'29); Allgemeine Geschichte des judischen Volkes (2 vols., 1832); Neuere Geschichte der Israeliten (3 vols., 1846-7), containing the history of the Jews since 1815; and Geschichte des Judenthums (3 vols., Leipsic, 1857-'9). He translated the Mishnah into German (6 vols., 1832-'4), and in 1839-'41 edited the Isra-elitische Annalen (Frankfort).
Isabella, a central county of the southern peninsula of Michigan, intersected by Chippewa river; area, 576 sq. m.; pop. in 1870,4,113. The surface is nearly level, and mostly covered with forests, principally of pine and sugar maple. The Flint and Pere Marquette railroad crosses the N. E. corner. The chief productions in 1870 were 27,786 bushels of wheat, 18,984 of Indian corn, 21,382 of oats, 39,001 of potatoes, 87,854 lbs. of butter, and 4,268 tons of hay. There were 568 horses, 867 milch cows, 1,532 other cattle, 1,911 sheep, and 1,375 swine. Capital, Mt. Pleasant.
See Edward II. and III.
See Edward II. and III.