A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . IRON. 625 332. is required in the construction either of the whole apparatus or in parts of it. Themanipulation varies in many re-spects. One worlcman, by inclininghis tuyere to the bottom, saves coalat the expense of obtaining a pooryield. Another, by carrying his tueiron more horizontally at tlie com-mencement, obtains a larger amountof iron, thongli at the sacrifice ofcoal. Good workmen pay great at-tention to the tuyere, and alter itsdip according to the sta
A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . IRON. 625 332. is required in the construction either of the whole apparatus or in parts of it. Themanipulation varies in many re-spects. One worlcman, by inclininghis tuyere to the bottom, saves coalat the expense of obtaining a pooryield. Another, by carrying his tueiron more horizontally at tlie com-mencement, obtains a larger amountof iron, thongli at the sacrifice ofcoal. Good workmen pay great at-tention to the tuyere, and alter itsdip according to the state of theoperation. The general manipula-tion is as follows:—The hearth islined with a good coating of char-coal dust; and the fire plate, or theplate opposite the blast, is lined withcoarse ore, in case any is at our dis-posal. If no coarse ore is employed,the hearth is filled with coal, andthe small ore piled against a dam ofcoal dust opposite the tuyere. Theblast is at first urged gently, anddirected upon the ore, while the coalabove the tuyere is kept cool. Fourhundred pounds of ore are the com-mon charge, two-thirds of whichare thus sm
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Keywords: ., bookcentury1800, bookdecade1860, bookpublishernewyo, bookyear1864
