BOCHUM, the chief town of a circle in the Prussian province of Westphalia and government of Arnsberg, on the railway between Duisburg and Dortmund. It is a busy industrial town, with manufactures of cassimeres, woollen cloth, carpets, and hardware of various descriptions. About 27,000 hand coffee-mills are turned out annually. There is an extensive steel factory in the hands of a company; coal-mines are worked, and coke is manufactured; and a considerable trade is carried on in grain. Population in 1871, 21,192. '