. Mixed metals, or, Metallic alloys . Fig. 5. T-^TTTr.,..-,:,^^^^^^. Fig. 6. Scale of Feet 3 4$? 1 ? 126 MIXED METALS by washing, and the dried oxide mixed with about one-thirdits weight of coal or charcoal, and introduced into crucibleswith alternate layers of granulated cupiier. The crucibles employed were made of fire-clay, 12 J- inchesdeep, 81 inches wide at the top, and 6| inches wide at themiddle, inside measure. The king-pot, as the middle potwas termed, was 13| inches deep, and would hold 120 metal, while the smaller ones would only hold 84 charge consisted of 100 lbs. c
. Mixed metals, or, Metallic alloys . Fig. 5. T-^TTTr.,..-,:,^^^^^^. Fig. 6. Scale of Feet 3 4$? 1 ? 126 MIXED METALS by washing, and the dried oxide mixed with about one-thirdits weight of coal or charcoal, and introduced into crucibleswith alternate layers of granulated cupiier. The crucibles employed were made of fire-clay, 12 J- inchesdeep, 81 inches wide at the top, and 6| inches wide at themiddle, inside measure. The king-pot, as the middle potwas termed, was 13| inches deep, and would hold 120 metal, while the smaller ones would only hold 84 charge consisted of 100 lbs. calcined ore and 40 , to every 66 lbs. of bean-shot copper. 1 The furnace used. Figs. 5 and 6, consisted of a circularchamber 7n, lined witli fire-brick ; it was contracted above toa circular opening, in which was fixed a cast-iron collar ee;it was closed at the bottom by a cast-iron bed-plate aa, inwhich were twelve holes sjanmetrically arranged round onelarger hole in the centre k, through which the ashes andclinkers could be withdrawn from time to time.
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherlondon, booksubject
