The new air compressors which furnish power to drive the drills, about 500 feet below the surface of the earth.
The new air compressors which furnish power to drive the drills, about 500 feet below the surface of the earth.
Miners descending the west shaft with the Burleigh Drill.
East end of tunnel, showing bed of road.
East end of tunnel, showing bed of road.
West end from the original surface standpoint, looking north-east.
Miners descending the west shaft.