Plate 62 



1. Cedartown, Georgia; hexahedrite; Ni-Co 5.70 percent. Graphite surrounding, and 

 in one place penetrating, a troilite nodule. Unetched; X 6. 



2. Cedartown. A sulphur print showing a number of troilite inclusions. The nodule 

 shown in figure 1 is at top of print. The outline of the troilite body is shown, though not 

 the central part of it; the graphite does not appear in the print. 



3. DuNGANNON, Virginia; medium octahedrite altered by reheating; Ni-Co 7.445 percent, 

 P 0.252 percent, C 0.532 percent. The unusually large carbon content appears in arborescent 

 form, as shown in the photograph. Kamacite shows secondary granulation and the plessite. 

 with higher magnification, shows diffusion. Picral 70 seconds; X 30. 



4. DuNGANNON. Part of the area shown in figure 3. Unetched; X 300. 



182 



