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The Boston and Colorado Smelting Company—better known as Prof. Hill’s—at Black Hawk, during 1872, purchased the following amounts of ore: From Clear Creek County, 2,100 tons, for which $320,000 were paid; from Gilpin County, 6,950 tons, for which $178,000 were paid; and from Park County, 600 tons, for which $88,000 were paid; making a total of 9,650 tons, and $586,000. This amount of ore was reduced to 640 tons of matte, which was shipped to Swansea, Wales. The average yield of the ore treated in 1871 was $80 per ton; and, estimating it at the same this year, the product of the works for 1872 have been $788,000. This would give an average value to the matte of about $1,230 per ton.
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