A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . tached from the test, and any adhering particles of bone-ash removed by the aid of a wire brush. A test furnace of ordinary dimensions requires for its construction about 2,000 commonbricks, 2,000 fire-bricks, and H tons of fire-clay. A furnace of this kind will work off 4pigs of lead per hour, and consume 4 cwt. of coal per ton of rich lead operated on. The cost of working a ton of rich lead in the neighborhood of Newcastle, containing onan average 400 oz. of s
A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . tached from the test, and any adhering particles of bone-ash removed by the aid of a wire brush. A test furnace of ordinary dimensions requires for its construction about 2,000 commonbricks, 2,000 fire-bricks, and H tons of fire-clay. A furnace of this kind will work off 4pigs of lead per hour, and consume 4 cwt. of coal per ton of rich lead operated on. The cost of working a ton of rich lead in the neighborhood of Newcastle, containing onan average 400 oz. of silver per ton, is as follows : — s. d. Refiners wages 421 Coals, 4 cwt. 06-8 Engine wages .- 170 Coals, 5 cwt. 0 8-7 Pearl-ash 0 3-5 Bone-ash, 17-3 lbs. 3 1-0 Repairs 0 5-0 Total 10 10-1 Figs. 387, 388, and 389, represent an elevation, plan, and section of a refining furnace ;A, fireplace; b, ash-pit; c, fire-bridge ; d, test-ring, sho^^Ti in its proper position ; e, flues ;F, point where blast enters; g, pig-holes.* * Pig-holes are used for introducing the lead In cases in which it is not laded into the test in a ,,.-T,e reduction to ,eta iic « J^ , , ^ S cJS S^c^^-^po,, ,l,oss, a^d the mixed metallic - ^ ^7; uin^S wo ex^^^^^ hat its din,ension«v,.,.l, apparatus, somwhat re^e^W, g ^^j^^^^^-^/^^Su-lv below the .loor,an- suKdhT, and the sole instead of ^^ owest im u j aepression in xvhieh gradually .he ^^^:^]\^;:;;^ZX^nJ^o^X^f^ou. M the reduced i;;;:^^fl::i=e;:i;; i:::;&y ^h^ side of the t^maco ^o. ?.. recep. ^^^^^^S;g:?;rr^!; ist??a;d;m;S ..th a quantity of smaU coal, and i.
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Keywords: ., bookcentury1800, bookdecade1860, bookpublishernewyo, bookyear1864
