66 J. L. Smith on Colorado Meteorites. 
Art. VITT.—On Colorado Meteorites— Russel Gulch Meteorite Iron, 
and Bear Creek Meteoric Iron; by Prof. J. LAWRENCE SMITH, 
Louisville, Ky. 
THE first of these irons I described in the September number 
of this Journal, calling it the “‘Colorado meteorite.” Owing to 
two short notives in the November number of this Journal, pages 
260 and 286, the specimen of it in my possession has enabled 
me to make a thorough examination of the constituents. The 
piece I have has a portion of the exterior attached. 
As has already been stated by Prof. Shepard, it is coarsely 
crystalline, and laminated from the effects of decomposition be- 
tween the crystals; the surface contains considerable pyrites, al- 
though Prof. Shepard did not discover any in his specimen. I 
was enabled to separate and analyze magnetic pyrites, schreiber- 
site and nickeliferous iron. Of the magnetic pyrites sufficient, 
was separated to make a quantitative determination which was 
as fullows : 
Sulphur, : . : . : ‘ 35°08 
FOR, 2% $ : . : ° . 61°82 
ickel, . $ é ‘ ‘ ; - “41 
Insoluble residue, . ‘. ' ‘ 1°81 
99°12 
The schreibersite was not obtained in sufficient quantity for 
a complete analysis; about 50 milligrams of the pure mineral 
gave all the constituents usually found in this interesting mineral. 
The nickeliferous iron, constituting of course the great bulk of 
f the mass, was composed as follows : 
Tron, Fe : ‘ ‘ . . 83°89 
Nickel, i ‘ ‘ P A 14°06 
Cobalt, ‘ : ‘ 
Copper, ; ae 
" ‘ 83 
minute quantity 
Phosphorus, - ; ‘ ‘ : S| 
98°99 
