JOURN.R.MICR.SOC.1913,Pl.VIII. 





Fig. 1. — Polished only. Cementite is in relief. 



Fig. 2. — Etched with picric acid. The white parts are cementite, 

 the dark parts sorbite, and the ground mass is ferrite. 



Sections from Roman Bloom Steel containing 1*6 pee, cent. Carbon, 

 showing evidence of segregation of cementite, and that the last heating of 

 the bloom was prolonged between 700"^ and 800^ C. (J. E. Stead.) 



