A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . 886. The cost of crystallizing one ton of calcined Spanish lead, in the establishment quotedwhen treating of calcination, is as follows;— s. d. Wages 9 5-4 Coals, 4 cwt. 0 8-4 Repairs 0 2-5 Total 10 4-3 The erection of nine six-ton pots requires 15,000 common bricks, 10,000 fire-bricks,160 feet of quarles, 80 fire-clay blocks, and 5 tons of fire-clay. In some establishments, ten-ton pots are employed, and where cranes are made use ofthey are found to be advantag
A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . 886. The cost of crystallizing one ton of calcined Spanish lead, in the establishment quotedwhen treating of calcination, is as follows;— s. d. Wages 9 5-4 Coals, 4 cwt. 0 8-4 Repairs 0 2-5 Total 10 4-3 The erection of nine six-ton pots requires 15,000 common bricks, 10,000 fire-bricks,160 feet of quarles, 80 fire-clay blocks, and 5 tons of fire-clay. In some establishments, ten-ton pots are employed, and where cranes are made use ofthey are found to be advantageous. Jiejininrf.—The extraction of the silver contained in the rich lead is conducted in a cupelforming the bottom of a reverbcratory furnace called a refinery. In this operation the litharge produced, instead of being absorbed by the substance ofthe cupel, is run off in a fluid state, by means of a depression called a gate. The size of the fire-place varies with the other dimensions of the furnace, but is usuallynearly square, and in an apparatus of ordinary size may be about 2 feet -(- 2 feet C is separated from t
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Keywords: ., bookcentury1800, bookdecade1860, bookpublishernewyo, bookyear1864
