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Show Gun Silencers Used on Railroad Engines Oil-electric locomotives for railroad yard use in cities would wake up the "neighborhood all night long were it not for gun silencers. These devices, invented for use on firearms for war service, so that gunners might fire silently, have found a new and growing grow-ing use. The silencers, unlike automobile exhaust ex-haust imilllers, do not reduce noise by placing obstructions in the path of the discharged gases, but by passing the exhaust through the peculiarly constructed silencing chamber. Oil-electric Oil-electric engines, designed especially for railroad switching service, generate gen-erate their power aboard without emitting emit-ting the smoke and noise. i, ll |