A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . -r-.^A — ^^-^-^l.,! ORES, DRESSING OF. 805 which slimes :ire lodged ; b, launder, delivering clean water into hopper a ; c, trommel ofsheet-iron, fitted in the interior with spikes for the purpose of dividing the stuff; d, disc,perforated to prevent the passage of pieces of chips or bits of clay and stone ; e, Archime-dian pipes fitted into a disc of sheet-iron, conveying water into gauze or perforated trom-mel F; G, slime cistern ; h, cistern for receiving t
A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . -r-.^A — ^^-^-^l.,! ORES, DRESSING OF. 805 which slimes :ire lodged ; b, launder, delivering clean water into hopper a ; c, trommel ofsheet-iron, fitted in the interior with spikes for the purpose of dividing the stuff; d, disc,perforated to prevent the passage of pieces of chips or bits of clay and stone ; e, Archime-dian pipes fitted into a disc of sheet-iron, conveying water into gauze or perforated trom-mel F; G, slime cistern ; h, cistern for receiving the rough stuff; j, slime outlet, communi-cating with round huddle, or other suitable apparatus; k, outlet for trommel raff, whichmay be delivered to a sizing cistern. The speed of the gauze trommel for fine slimes variesfrom 80 to 100 feet per minute. Hand Buddie.—This apparatus is somewhat extensively employed in lead mines for theconcentratiou of stuff which contains but a small proportion of ore, such as middles and 513. tails resulting from the round buddle, or the tails from strips, &c. A rising column of wateris shown at a. This flows into a trough b, and through peg-holes into c. Here the stuff tobe treated is introduced, and continually agitated by the boy in attendance. The finer por-tion passes through the perforated plate at d, and is distributed by the fan-shaped incline Ein a uniform sheet on the head of the buddlef. A boy stands just below the higher line ofmiddles with a light wooden rake ; with this instrument he continually directs the descend-ing current to the head of the buddle, and by this means succeeds in separating a largerproportion of the ore than would otherwise be done. Whether the rake or the broom beemployed, it is found that some of the fine lead is jlorrined to the extreme tail of thebuddle. In order to prevent this, the frame G has been introduced. It is strained withcanvas, and always floats on the flooded water. This canvas retains the fin
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Keywords: ., bookcentury1800, bookdecade1860, bookpublishernewyo, bookyear1864
