A quantitative analysis of the tailings at any of the quartz preferable, but a barn door will answer. On this is ruled be pure, and is at all events free from sulphur, an ever- mills or placer washings will determine the difference of the horizontal center line, AB, in the engraving, say in red… … favorable conditions, very great skill and attention are ne- the board is also divided vertically into twenty hour sec- adjustment of conditions it seems to have become possible, cessary to insure success. To avoid the cost of smelting, tions, numbered to represent the hours as shown. The red else…
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