Owing to the fact that the gold mines of this district have been worked
to the water line, almost without exception, what now remains to be done
to perpetuate the prosperity of the district, is to concentrate the
sulphurets, working them by chlorination in works built in the district.
Wood and water are both obtainable at moderate cost, and the
sulphuretted ores of this district that contain but a very few dollars
per ton should pay. The cost of mining, transportation, crushing, and
concentrating should not exceed, ordinarily, $5 per ton of quartz, and
the expense of treating the concentrates should be under $10 per ton.
Base ores containing $10 per ton as it comes from the vein should
realize a profit in this district, and I am told that many of the mines
produce rock of a much better grade than that mentioned.