Peirce
BENJAMIN, an American mathematician; born in Salem, Mass., April 4, 1809; studied at Harvard, where in 1833 he became professor. In 1849, he became consulting astronomer to the "American Nautical Almanac"; and from 1867 to 1874 he was superintendent of the Coast Survey. In 1836-1846 he issued an admirable series of mathematical text-books, and he contributed to various mathematical journals. His paper on the discovery of Neptune (1848) attracted universal attention; and his PEIXOTTO PEKING papers on the constitution of Saturn's railroads. Its industries include the rings (1851-1855) were equally remarkable. His great " Treatise on Analytic Mechanics" appeared in 1857; and he left his mark on various departments of mathematical and astronomical investigation. He died in Cambridge, Mass., Oct. 6, 1880. manufacture of agricultural implements, wagons, carriages, brick and tile, foundry products, important coal producing and agriculcts, etc. It is the center of an tural region and has a considerable grain market. It has an important shipping trade by rail and water. Its public buildings include a library, a court house, 12,086. buildings. Pop. (1910) 9,897; (1920) government buildings, and public school 12,086.