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Show SyrATTY MINE LOCOMOTIVE WOIIKK IX LOW DKIKTH. To meet conditions in a certain conl mine whoso galleries nro very low, n special electric loconiotlvo which oxtonds only 2C inches abovo tho rnils has been built. It Is Atted with two trolley poles, ono on each side, nnd a 300-foot reel of cnblo that Is employed in passages too low to permit overhead conductors to be strung safoly. Tho freo end of this insulated lino is supplied with a hook which tho operator slips over the trolley wire in ono of tho mnln levels when he is about to enter a small side drift. As tho loconiotlvo proceeds tho reel unwind?. When tho direction Is reversed nnd tho distance dis-tance retraced, tin reel w'nds automatically, auto-matically, recoiling tho cablo rapidly so that It does not slacken enough to cnuso Interference. A plcturo of tho loconiotlvo appears In tho April Popular Mechnnlcs Magnzlno. |