Wupper

Wupper, or WIPPER, a tributary of the Rhine, which enters on the right bank between Cologne and Düsseldorf. The river, about 40 miles in length, has a strong current, and is used as motive power by hundreds of mills, so that the Wupperthal, especially that part of it which contains the towns of Barmen (q.v.) and Elberfeld (q.v.), is one of the most populous and industrial in Germany. The religious zeal of the inhabitants, and their interest in missions, are conspicuous.