A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . the slimes. Thebottom is fitted with a launder, i,, 7 inches long, and 5 inches wide. From this launder pro-ceeds a head-board, m, expanded to the width of the table, and fitted with buttons, for thepurpose of dispersing the slimes eciually on the head of the table. At the Breinigerberg Mines the slimes are very fine and tough, and not rich in the round huddle unimportant results were obtained ; but the stossheerd concentrated ORES, DRESSING OF. 877 t
A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . the slimes. Thebottom is fitted with a launder, i,, 7 inches long, and 5 inches wide. From this launder pro-ceeds a head-board, m, expanded to the width of the table, and fitted with buttons, for thepurpose of dispersing the slimes eciually on the head of the table. At the Breinigerberg Mines the slimes are very fine and tough, and not rich in the round huddle unimportant results were obtained ; but the stossheerd concentrated ORES, DRESSING OF. 877 them satisfactorily. About five tons of rough slime are enriched per day on four tables,whilst from nine to ten tons of the enriched slime are despatched in a similar period. The four tables are managed by two boys, at a cost of Is. 2d. per day. The cost ofthese machines complete, including water-wheel, 9 feet diameter, and 3 feet in breast, was£114. Sleeping Tables.—Figs. 530, 531, represent a complete system of sleeping tables, tablesdoniantes, such as are mounted at Idria. Fig. 530 is the plan, and Jig. 531 a vertical sec-. tion. The ores, reduced to a sand by stamps, pass into a series of conduits, a a,b b, c c,which form three successive floors below the level of the floors of the works. The sandtaken out of these conduits is thrown into the cells q, whence they are transferred into thetrough f, and water is run upon them by turning two stop-cocks for each trough. The sandthus diffused upon each table, runs off with the water by a groove /, comes upon a sieve A,and spreads itself upon the board 9, and thence falls into the slanting chest or sleeping tablei k. The under surface k of this chest is pierced with holes, which may be stopped atpleasure with wooden plugs. There is a conduit m at the lower end of each table to catchthe light particles carried off by the water out of the chest i k, through the holes properlyopened, while the denser parts are deposited upon the bo
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Keywords: ., bookcentury1800, bookdecade1860, bookpublishernewyo, bookyear1864
