This delightful retreat was located in an utter mountain wilderness, many miles from the nearest power line; but when I got there I found a radio was pounding out music. This radio, it turned out, was powered by a waterwheel! Some clever inventor has built a small wheel which floats in midstream suspended from cables, thus avoiding costly and ecologically damaging embutments. It generates 24-volt power which, stored in a couple of batteries, is plenty to run the radio, a pump, and the few electric lights needed in a country place where people go to bed early.
