574 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxi. 



Weinschenk " has described a carbide of iron, cohenite, having the 

 following- properties: Hardness 5.5-6, specific gravity 6,977, luster 

 metallic, color tin-white, becoming bronze yellow on exposure. Occur- 

 ring in crystals, pro babl 3^ isometric, having the following composition: 

 Fe, 89.88; Ni (Co), 3.71; C, 6.41; Sn, Cu, trace. 



The graphitic iron here described differs from cohenite, in that it is 

 soft enough to leave a mark on white paper; does not occur in crys- 

 tals belonging to the isometric system but in angular foliated masses. 

 Its color is dark steel gray, while cohenite is tin-white. 



a Ann. Mus. Wien., IV, p. 94, 1889. 



