. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. of Silver, by M. Eissler. Fourth edition. London: CrosbyLock wood & Son. AMALGAMATING PANS. 385 foreign matter, and rendered it inert for the amalgamation of the goldand silver. The opposite method is to stamp fine in the batteries, anduse the pans for amalga-mation only, and not forreducing the ore still finerby grinding; and, strangeas it may seem, it is veryprobable that better resultscan thus be obtained thanby the former and moreancient method. Amalgamation. —Themodern ama
. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. of Silver, by M. Eissler. Fourth edition. London: CrosbyLock wood & Son. AMALGAMATING PANS. 385 foreign matter, and rendered it inert for the amalgamation of the goldand silver. The opposite method is to stamp fine in the batteries, anduse the pans for amalga-mation only, and not forreducing the ore still finerby grinding; and, strangeas it may seem, it is veryprobable that better resultscan thus be obtained thanby the former and moreancient method. Amalgamation. —Themodern amalgamating pan,such as is shown in , 253, is the develop-ment of the old Spanish-American arrastra, ofwhich, for the sake of com-parison, an illustration is. Fig. 252.—Amalgamating Pan. given in fig. 251. Some of thepans are provided with a false bot-tom, forming a steam chamber, asin fig. 271 (page 416), while in othersthe steam is introduced direct intothe pulp, for the purpose of heatingit, by means of a pipe. The pan holds from 15 to 2 tons of pulp ac-cording to its size, and water is mixed with it as it is shovelled in fromthe settling tanks, in such a quantity as will enable it to keep the finely 25 Fig. 253.—AmalgamatingIPan. ;86 IMACIIINKRY FOR :\IETALLIFEROUS MINES. divided globules of quicksilver in a state of suspension throughout itsmass, and yet not so thick as to prevent its free circulation. The heat should be kept at about 200° Fahr., and the muller, whichat first does not touch the grinding surface, is gradually lowered, andallowed to grind either with its full weight or otherwise, according tothe class of ore. In the course of two hours or so, the pulp is reducedto the required condition, and quicksilver is then scat
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