ETNA

etna, a borough of allegheny county, pennsylvania, u.s.a., in the western part of the state, on the w. bank of the allegheny river (about 5 m. from its junction with the monongahela), and about 2 m. n. of the city of pittsburg, of which it is a suburb. pop. (1880) 2334; (1890) 3767; (1900) 5384 (1702 foreign-born); (1910) 5830. it is served by the pennsylvania railway and by electric lines. among its industrial establishments are rolling mills, tube and pipe works, furnaces, steel mills, a brass foundry, and manufactories of electrical railway supplies, boxes, asbestos coverings, enamel work and ice. the city's industrial history dates from 1820, when a small factory for the manufacture of scythes and sickles was set up. natural gas, piped from butler county, was early used here as a fuel in the iron mills. etna, formerly called steuart's town, was incorporated as a borough in 1869.