. Mixed metals, or, Metallic alloys . Scale V» of an inch to afoot Section through C. D Via. 11. Scale y& of an inclito afoot02468 131 Feet. 132 MIXED METALS of the flue should be from one-sixth to one-fourth that ofthe firephice. Defective draught very often arises from thebad construction of the flues, for when tlie draught holesfrom several furnaces open into a common conduit thecurrents, being continued beyond their orifices, modify eachother. Figs. 7 to 12 show in plan and elevation a row of 6large sized furnaces with their flues opening into a commonstack. Furnaces for melting metals, he
. Mixed metals, or, Metallic alloys . Scale V» of an inch to afoot Section through C. D Via. 11. Scale y& of an inclito afoot02468 131 Feet. 132 MIXED METALS of the flue should be from one-sixth to one-fourth that ofthe firephice. Defective draught very often arises from thebad construction of the flues, for when tlie draught holesfrom several furnaces open into a common conduit thecurrents, being continued beyond their orifices, modify eachother. Figs. 7 to 12 show in plan and elevation a row of 6large sized furnaces with their flues opening into a commonstack. Furnaces for melting metals, heated with gas insteadof solid fuel, have been adopted in some works. Fig. 13shows an arrangement formerly used in the Berlin PorcelainManufactory, and in the mint. A is a chamber of fire-brickhaving an ordinary flat grate, composed of iron bars, andanother gi-ate in which the bars are placed in steps b. Ona grate of this kind small free-bmiiing coal may be used,which would in a great measure drop through an ordinarygrate. The sm-face of the grate, by this step-like aiTange-ment of bars, is considerably increased, and ample spaceallowe
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherlondon, booksubject
