. Transactions. Fig. 2. X 100. Unetched. % C. QUEXCHED AT 2,119° C. PRI-MARY Precipitation of FeC,. Fjg. 3. :< 100. Unetched. %C. Quenched at 2,028° C. LargePrimary Precipitations of FeCjFormed on Cooling from 2,380°to 2,028° Fig. 4. X 100. Etched with HNO,,1 : 4. Quenched at 2,028° C. C. Large Primary Precipita-tions OF FeC,, Arrows of PrimaryFeCj and Graphite (below to theright). Fig. 5. x 100. Etched avith HNO:,,1 : 4. About % C. Quenchedat 2,028° C. Primary FE3C (Ar-rows) ON A EUTECTIC-LIKE GrOUND- Mass of Fe,C + Fe,C.

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries