. Transactions . wn in December 15,1880, and also (by broken lines) the size and shape in July, figure is repeated from vol. xiii., p. 497, of our Transactions,where the method of determining the latter lines is explained. The first blast under Mr. Cooks management continued for 105weeks, during which time 37,400 tons (of 2268 pounds each) of pig-iron were made, an average of tons per week. The consump-tion of coal for the blast (anthracite only being used) averaged tons (2884 pounds) per ton of iron—including the filling ofthe furnace. The ores used averaged p
. Transactions . wn in December 15,1880, and also (by broken lines) the size and shape in July, figure is repeated from vol. xiii., p. 497, of our Transactions,where the method of determining the latter lines is explained. The first blast under Mr. Cooks management continued for 105weeks, during which time 37,400 tons (of 2268 pounds each) of pig-iron were made, an average of tons per week. The consump-tion of coal for the blast (anthracite only being used) averaged tons (2884 pounds) per ton of iron—including the filling ofthe furnace. The ores used averaged per cent., and tons of limestone were required per ton of pig-iron. Duringthis blast the monthly maxima and minima were: Maxima. Minima. Gross tons of pig-iron made, Gross tons of anthracite per ton of iron, . Yield of ore in furnace, per cent., . . W. ■ ■ —— * Transactions, vol. xiv., page 130. OPERATION OF WARWICK FURNACE, PENNSYLVANIA. 835 Fig. 833 OPERATION OF WARWICK FURNACE, PENNSYLVANIA. The record of this blast exhibits a remarkable uniformity in allthe operations up to the last, when the furnace was forced to blowout, as the lining had so worn away as to permit part of the backingto fall in. The work of the plant had been so satisfactory that the stack wasrelined to the same shape as before. The First Short Blast. The next campaign was the short blast, described in vol. ix.,from March 27th, 1880, to June 4th, 1880, less than 10 weeks, whenthe furnace made 3777J gross tons of pig-iron. A tabulated recordof the detailed operation for each week, with analyses of ores usedand cinder made, was presented, and to describe the operation of thefurnace and its behavior at the close of the blast, extracts from thefurnace note-book were given verbatim. These extracts from the diary of Mr. Cook show that the opera-tion of the furnace during the last six days of the blast was entirelysatisfactory, and, with the exception
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
