Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 171
hey strike a shore or the sides of a basin exerta thrust, or a repelling action, which may easily be observed.That sound-waves act in similar fashion isRepulsion by proved by a little sound-mill devised in 1883 byProfessor V. Dvorak, of the University ofAgram in Austria. It consists of four… … Dvorak Sound-mill. toward this box, its narrow opening toward the mill. A stroke onthe tuning-fork emits vibrations which send tiny jets of air againstthe sails of the mill, which accordingly rotate at a pace proportionate to the loudness of the sound. LIGHT DEFLECTS DUST 133 pf* Professor Ernest…
Inventions · Inventors
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