Metallurgical Studies of Rhodonite Ores, Silverton District, Colorado (In Three Parts).
Metallurgical Studies of Rhodonite Ores, Silverton District, Colorado (In Three Parts).Robert W. Smith
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Studies were made to determine the effect of the shape of a pneumatic-rock-drill exhaust muffler on its efficiency, and the origin and reduction of exit noise from the mufflers. The report describes the investigation of rock-drill noise abatement.