The New Student's Reference Work/Windmill - Wikisource ...
See also Windmill on Wikipedia, and the disclaimer . 1410203 The New Student's Reference Work (1914) — Windmill. Wind'mill', a wheel driven by wind to obtain power. Windmills vary in diameter from eight to thirty feet. The largest sizes in ordinary wind developing as high as four H. P. The ordinary pumping-wheel develops less than one quarter ...