120 



BELL SYSTEM TECHNICAL JOURNAL 





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Fig. 14 — Mag. 3500X. Fig. 14 is of a specimen which was quenched and then 

 drawn for ten minutes at 650° C. The outHne of a troostitic notkile is clearly marked 

 by globular carbide particles. The hardness of the specimen was C-28 after temper- 

 ing. 



