. Transactions. Fig. a. Fig. B. Ingot steel, as east. Carbon, per cent. X 68. SSfr • ••-?Aii ^^m-^. i--:^ Fig. C.—Ingot steel, as cast. X Fig. D.— per cent, nickel steel,as cast. X 68. Plate I. HAROLD EARLE COOK 245

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries