U. S. NATIONAL MUSEUM 



PROCEEDINGS. VOL. 99 PLATE 22 



Fig. 1.- An irrcjular plessite field containinu lamellae of taenitc (.eray) and small 

 areas of incompletely transformed gamma-alpha aggregate. Small schreibersite 

 bodies surrounded by h_\'droxide. Picral 85 seconds; X about .vv 



Fig. 2. — A plessilc field with a pearlitic structure of kamacite and taenite lamellae, 

 almost surrounded by hydroxide. At this magnification it resembles similar areas of 

 pearlitic structure in a number of other irons (e. g., Leeds, Seelasgen, Youndegin) in 

 which the white lamellae are kamacite and the gray are taenite. Picral 30 seconds; 

 X about 40. 



