408 STUDIES FOR STUDENTS 



found in the Magura meteorite. These are arranged parallel to 

 octahedral planes. An iron carbide similar to cohenite is formed 

 in cast iron when the latter is heated to a temperature of 6oo- 

 700° C. and slowly cooled. Cohenite occurs in the terrestrial 

 iron of Niakornak, Greenland. 



Oliver C. Farrington. 



(To be continued.) 



