Show silencer for engine it la Is sometimes necessary to take heroic measures to preserve our UL sl lence consider the problem of the tucson light and power company which has a diesel engine althan with an ex haust baust pipe 82 32 inches in diameter the roar of which could be beard for 14 miles to overcome the tremendous and unbearable noise which the engine would develop a maxim silencer has been built which weighs pounds Is seven feet in diameter and Is 20 feet long the first silencer of bf this type was six inches long and went on the end of a pun gun barrel |