Managenese.-Estimates of production at various prices are as follows; they assume the continuation of existing technique of mining, recovery, and smelting without the investment of much new capital: Assumed price per ton: $20, first year_- $20, second year $20, third year_. $35, first year-$35, second year $35, third year__. Tons 35,000-50, 000 35, 000-50, 000 35, 000-50, 000 80, 000-100,000 100, 000-150, 000 200, 000-250,000 Attached are estimates of tonnages and grades in three categories of deposits in the Western States. Outstanding domestic manganese districts not complete for entire United States 50,000 1,400,000 250,000 "Estimated reserve based in part upon exploratory work of Bureau of Mines cooperating with U. S. Geological Service. Unknown. 1 Oxide. 7, 000, 000 1,600,000 180,000 4,500,000 140,000 |