. Westmoreland, Cumberland, Durham, and Northumberland, illustrated : from original drawings by Thomas Allom, George Pickering, & c. ; with descriptions by T. Rose . CUMBERLAND, DURHAM, AND NOKTIlUMBEltLAND. jjC) the other ingredients, the weight of the ores will give a tolerable idea of their relativevalue. Previously to working them, the ores are minutely analyzed, to ascertain whatsubstances should be combined with them in the furnace, to extract the metal, and fusethe earthy parts. In the process of smelting, two things are absolutely essential to theseparation of the iron. First, the meta
. Westmoreland, Cumberland, Durham, and Northumberland, illustrated : from original drawings by Thomas Allom, George Pickering, & c. ; with descriptions by T. Rose . CUMBERLAND, DURHAM, AND NOKTIlUMBEltLAND. jjC) the other ingredients, the weight of the ores will give a tolerable idea of their relativevalue. Previously to working them, the ores are minutely analyzed, to ascertain whatsubstances should be combined with them in the furnace, to extract the metal, and fusethe earthy parts. In the process of smelting, two things are absolutely essential to theseparation of the iron. First, the metal itself must be rendered fluid, which will then, byits great specific gravity, descend to the lowest parts of the furnace; and, in the nextplace, something must be employed to combine with and fuse the substances united to theiron in the ore. The coal employed in the smelting of iron is commonly laid, for thepurpose of being coked, in heaps in the open air, and afterwards set on fire. The averagecharges of coke for the furnace, per shift, as it is termed, or in the space of twelve hours,are fifty, of two hundred weight and three-quarters each, amounting toge
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Keywords: ., book, bookcentury1800, bookidwestmorelandcumb00rose, bookyear1835
