As this wonderful engineering feat is accomplished, we give a few facts relating to it. This tunnel is intended to render easy the work of mining in the Comstock lode, which had become unprofitably expensive. The mines had reached a depth of over 2,000 feet, and the yearly expense of getting rid of the water, reached nearly $3,000,000. Added to the expense was the fact that the temperature of the lower depths had become almost unendurable. The object of the tunnel from the side of the hill was to tap the mines some 1,800 feet from the opening of the shafts, thus allowing the mines to be drained by natural flowage, and at the same time the heat would be lessened through the ventilation thus obtained. The ore would also be removed by this tunnel. The work has occupied about ten years, and has cost all of $3,000,000.