. Transactions. Fig. 40.—Same area as Fig. 38 after drawing several hours at 300° C, SHOWING CHANGE PROM AUSTENITE TO MARTENSITE. EtCHED 10 SEC. WITH 4 FEBCENT. NITRIC ACID. X 500. H. E. WHEELER 285. Fig. 41.—Same area as Fig. 28 after drawing at 200° C. for 24 hr. Ads- TENITE IS changed TO MARTENSITE. EtCHED 10 SEC. WITH 4 PER CENT. NITRIC ACID. X 250.

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries