Mines. graving, which closes the front opening of the chute The business of mining in this country has grown and allows the water or mud to pass out at M. To wonderfully within twenty-five years. Our coal pro- retain and secure the elevator at any point, as the duction, which was the main mining… … angle, always retaining an upright position. This is shared by the lifting is done by a yoke, shown in the dotted lines, which rope and the incline at I. suspends the elevator by the rear of the bottom, and Soon as the elevator begins to turn over, a portion ple evincing no predilection for the…
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