COST OF MINING PER TON.-The following items are from official sources: Savage mine-average cost per ton of the last six months of 1866. Gould and Curry mine-average cost per ton for the 12 months ending November Hale and Norcross mine-average cost per ton for the 12 months ending March These results show a marked improvement on previous years, and enable lower grade ores to be worked more profitably than was formerly the case. Some portion of the diminution in cost is due to the lower price of material, but by far the greater part to more efficient management and systematization of labor. |