COLORADO METEORIC IRONS. 345 



cral gave all the constituents usually found in this interesting 



mineral. 



The nickeliferous iron, constituting of course the great bulk 



of the mass, was composed as follows : 



Iron 83.89 



Nickel 14.06 



Cobalt 83 



Copper, minute quantity. 



Phosphorus .21 



98.99 

 The laminse of iron are often very brilliant, having the 

 luster of silver, and caused me to suspect more nickel than was 

 found. It was supposed that in the decomposition of the crys- 

 tals the iron would disappear more rapidly than the nickel, and 

 that by a process of cementation the nickel would accumulate 

 in the laminae ; but from careful examination of the process 

 of decomposition there is no doubt that the interior of the mass 

 will not differ materially in its composition from, the analysis 

 already given of the nickeliferous iron. Besides the minerals 

 already mentioned, and which properly belong to the original 

 mass, there is much oxide of iron, containing some nickel 

 arising from the decomposition of the surface. 



