Show silencer for engine it Is sometimes necessary to take lake heroic measures to preserve our bl sl lence consider the problem of the jacht an alq power company which has it engine with an exhaust pipe 32 inches in diameter diameter the roar of which could be heard for 14 miles to overcome the the bremen tremendous dous aud 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 this type was six inches long and went on the end of a gun barrel |