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Ch. 6: Mining, Milling, ... of Sulphurets

Ch. 6: Mining, Milling, ... of Sulphurets Page of 172 Ch. 6: Mining, Milling, ... of Sulphurets Text size:minus plus Restore normal size   Mail page  Print this page
136                                    GOLD MIXING IX SOUTH CAEOLINA.
discharge is 6 inches. Amalgamation is accomplished: (1) In the mortar by a curved front plate attached by means of a wooden chuck-block to the lip of the mortar, immediately below the discharge; it is held in position by bolts and can be rapidly and easily removed. It presents an amalgamation-surface of 1.75 square feet and is made of Xo. 7 silverplated sheet-copper. The gold being very fine, its accumulation in the mortar between the dies is insignificant, and the mortar is seldom cleaned
out. (2) On the outside plates, made of ~No. 12 silvered copper-sheet, and presenting an amalgamation-surface of 32 square feet to each battery of 5 stamps; they are the full width of the mortar and are arranged in four steps, each 2 feet in length, and overlapping the next by 1 inch, the inclination being 2 inches in 1 foot. They are fastened directly to the battery, the tremor caused hereby being considered beneficial to amal-
Ch. 6: Mining, Milling, ... of Sulphurets Page of 172 Ch. 6: Mining, Milling, ... of Sulphurets
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