From the February 7, 1931, issue
By Science News
LITTLE WATERWHEEL DOES BIG POWER JOB
Fortunate are those countries that have small rivers falling rapidly, rather than huge, slow-moving streams. Electricity can be generated for these nations easily and cheaply.
To make electricity for Korea from the 2,000-foot fall of a mountain stream will be the life work of the Voith impulse water wheel shown on the front cover. Though its greatest diameter is just a little more than 11 feet and it weighs only 11 and a half tons, when turning at 260 revolutions per minute, this simple wheel of steel develops 50,000 horsepower.