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Scientific American, Vol. 83, No. 1 (1900) (1900)

leaf 8

An illustration from Scientific American, Vol. 83, No. 1 (1900), 1900, leaf 8
he mill, and under a head oi gun the erection of a 60-stamp mill, and will likely treat they are rotated at about six revolutions per minute 235 vertical feet, the water is admitted through a 44- for three to five hours. The solution is then washed out its concentrates by the cyanide of potassium… … about 41g miles. At the must travel, its course is point of crossing, there is very sinuous, and it is nearly 20 miles long. It also concentrated a‘ large within the barrels are filters that retain most of the amount of street railway traffic, in addition to a con- was begun in 1859, but was not…

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