MATERIALS USED IN SMELTING. 



639 



V V. PROPOETIOXAL KELATIONS. 



1. Parts of dolomite to 100 parts of oio. 



2. Parts of hematite to 100 parts nf ore. 



3. Parts of fuel to 100 parts of ore. 



4. Parts of fuel to 100 parts of smelting cbargos. 



5. Bullion extracted to 100 parts of ore. 



6. Percentage of lead extracted in smelting. 



7. Percentage of silver extracted in smelting. 



8. Charges for smelting per ton of ore, in dollars. 



9. Cost of smelting per ton of ore, in dollars. 



10. Average assay of slag, in ounces of silver per ton. 



11. Average assay of tlue-dust, in ounces of silver per ton. 



11. 



15 to a 

 12tol 



.37 



83.04 



23.33 



16.31 



86 to 91 



95 to 97 



15 to 30 



18 to 23 



4 



37 



22.43 

 9. .54 

 34.19 



15 to 30 

 10 to 15 



5.95 

 6.95 

 19.06 

 15.33 

 11.98 

 5 to 95 

 8 to 95 



2 to 25 



3 to 16 



1.5 

 35 



5.23 

 6.98 

 24.96 

 19.33 



14.74 

 85 to 90 

 95 



16 to 30 

 15 to 18 

 1.5 

 35 



16.64 

 20.06 



47.76 

 32.50 

 23.8 



15 to 30 

 13.00 



36 



11. 65 

 25.49 

 19.00 

 15.75 

 87 



98.5 

 15 to 30 

 13.68 

 1.5 

 36 



No data 

 No data 

 No data 

 No data 



41.66 



90 



97.5 

 15 to 30 



15.00 

 4 



37 



No data 

 No data 

 No data 

 No data 

 No data 

 85 to 90 

 96 



15 to 30 



16 to 18 



1.5 

 37 



010.88 



as. 3 



032. 83 



o24. 03 



O20. 53 



88 



96.5 



22.00 



15.25 



a These five averages were obtained by dividing by seven the sum of ihe respective proportions given for each 

 smelter from -which data were obtained. Thi.s gives a true average of the proportions for eacli smelter, but it might be 

 considered that a truer average for the camp wonld be obtained directly from the totals of ore, fluxes, and fnel consumed 

 during the year by these seven smelters. Calculated in this way, the average proportions are, respectively, dolomite to 

 ore, 12.50; hematite to ore, 6.51 ; fuel to ore, 31.99; fuel to charge, 23.31 ; bullion to ore, 19.94. 



VI. PLANT OF SMELTERS. 



