. Report of the Geological exploration of the fortieth parallel . ore is performed in pans, as at the Manhattan mill. Thebullion produced is between 700 and 800 fine, the impurity being chiefly cop-per. The average yield of the ore during the year 1867 was $111. The oreassays from $130 to $150; of which value 80 or 85 per cent, is obtained inthe mill. Pan-tailings assay from $12 to $14 per ton. The machinery is driven by an engine of which the cylinder is 18 inchesin diameter and 36 inches stroke; for which steam is furnished by two tubu-lar boilers, 15 feet long, consuming about 6 cords of wo
. Report of the Geological exploration of the fortieth parallel . ore is performed in pans, as at the Manhattan mill. Thebullion produced is between 700 and 800 fine, the impurity being chiefly cop-per. The average yield of the ore during the year 1867 was $111. The oreassays from $130 to $150; of which value 80 or 85 per cent, is obtained inthe mill. Pan-tailings assay from $12 to $14 per ton. The machinery is driven by an engine of which the cylinder is 18 inchesin diameter and 36 inches stroke; for which steam is furnished by two tubu-lar boilers, 15 feet long, consuming about 6 cords of wood per day. The ordinary costs of reduction of the ore during 1867, for 3,847^ tons were $35 36 And for repairs, per ton 5 19 Equal to 40 55 Of which the details are given below. The following statements show the working expenses of this mine for theyear 1867, including mining, milling, and general costs for the whole business. 388 MINING INDUSTET. •IsoD tb;ox 8 j^ bo .a•3 o S^ *: O in m Tj- cr« H t^ ■^ ro H H H <©■ o^ o • . t^ H \0 O HTj- ON VO. CENTEAL AND EASTEEX NEVADA. 389 Brought down , $53,835 39 Mining captains and timbermen 6, 868 53 Wheelers, trammers, and sorters under ground, and landers 12,401 60 Cost of raising ore and water 9, 658 24 Cost of sharpening drills, picks, &c 10,493 05 All other blacksmith work 1,316 27 Carpenter work 1,222 49 Timbers, lagging, lumber, and other materials 9,187 56 Pump-pipe and rods, labor and repairs 1,326 88 $106,310 01 Assorting and hauling ore. Labor in assorting 3,837|^ tons ore 5,954 00 Materials used 41 31 Hauling 3,737^ tons ore to mill 477 09 Cost of repairs to cars and wagons ,.. 38 75 6,511 15 Eeduction cost, as per following statements of current costs and repairs , 155,999 74 Bullion charges. Transportation 3,209 90 Charges on sales to Austin bankers 10,232 06 Melting, assaying, and United States tax 5,308 30 18, 750 26 General ergense. Expense of agents, clerk, and superintendence 11,068 76 Other general ex
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