Transactions . Fig. 4.— Unetched. Fig. 4a.—Etched. C, per cent. ; O, per cent. y vA ar r r^i- Fig. 5.—Unetched. Fig. 5a.—Etched. C, per cent. ; O, per Fig. 6.—Unetched. Fig. 6a.—Etched. C, per cent. ; O, per cent. Plate I.—Samples from Heat B. All Sections Magnified 140 Diameters. 440 OVER-OXIDATION OF STEEL.

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries