A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . posited in the bottom of b\ In the bottom of B will be found small particles of greatspecific gravity and large particles of small specific gravity. The same relation will exist inB^, B, and B^, only the particles of each will be smaller in succession. The plugs in theholes c c c, being opened as is found necessary, allow the accumulations in the bottom ofeach trunk to discharge themselves into separate troughs. The rocking-frame and rakes d dconstantly stir up
A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . posited in the bottom of b\ In the bottom of B will be found small particles of greatspecific gravity and large particles of small specific gravity. The same relation will exist inB^, B, and B^, only the particles of each will be smaller in succession. The plugs in theholes c c c, being opened as is found necessary, allow the accumulations in the bottom ofeach trunk to discharge themselves into separate troughs. The rocking-frame and rakes d dconstantly stir up the sediment so as to bring it under the action of the water. To producethe oscillation of the rakes, two spade-shaped plates e k are exposed to the action of thefalling water discharged from the end of the box which rocks the frame to and fro. Theore in the first trunk is fit for smelting ; the ore passing off from the bottom of the othertrunks is in a very favorable condition for framing, or it may be sifted to remove the largerparticles of less specific gravity. 2he Rack or Hand-Frame.—This is composed of a frame c, Jic/.
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Keywords: ., bookcentury1800, bookdecade1860, bookpublishernewyo, bookyear1864
