“ The most important industry is the manufacture of agricultural implements (particularly steel ploughs, which seem to have been made here first in the United States, and corn-planters) . Among the other manufactures are boilers and gasolene engines, wagons and carriages, automobiles, and pianos and organs. The Chicago, Rock Island & Pacific railway has a 900-acre yard and machine shop east of the city limits, and there is a large U.S. arsenal on Rock Island. ”