Physical description
8447.1 - Elongated ovoid of metal, with both ends possessing spikes, one adjustable, evidently to secure it in the roof and floor of the mine; and notches along its length, presumably to hold the auger.
8447.1 - Elongated ovoid of metal, with both ends possessing spikes, one adjustable, evidently to secure it in the roof and floor of the mine; and notches along its length, presumably to hold the auger.