100 THE MINERALS OE CHILE. 



Domeyko gives the analysis of a specimen where lime appears to replace part of the lead. It 



is as follows — 



Oxide of lead - - - - - - 43.00 



Molybdic acid - - - - - - 42.20 



Lime -------- 6.3 



Peroxide of iron ------ 8.5 



100.00 



lEON. 



Meteoric Iron. — This is found scattered in some parts of the desert of Atacama, in pieces from 

 the size of a small nut to lumps weighing fifty pounds, and more. It is of a porous nature, 

 the pores being filled by a yellowish and greenish olivine, sometimes the olivine constituting 

 one-fifth the mass. We have no account of the falling of these meteoric masses. One speci- 

 men that was examined gave — 



Iron -------- 90.08 



Nickel -------- 9.12 



Cobalt -------- 0.39 



Copper- ------- 0.03 



Phosphorus - - - - - - - 0.13 



99.75 



The olivine accompanying was also analyzed — 



Pulverulent olivine. Compact olivine. 



Silica ----- 40.50 39.51 



Peroxide of iron - - - 11.54 13.38 



Magnesia - - - - 46.41 47.37 



Manganese - - - - .35 .16 



Lime ----- trace. trace. 



98.80 100.42 



Magnetic Oxide of Iron. — Found in veins of copper at Higuera and various other parts of 

 the provinces of Coquimbo, Copiapo, and Chilian. Its constitution is — 



Iron -------- 72.40 



Oxygen - 27.60 



100.00 



Formula, Fe. 

 Micaceous Oxide of Iron. — It is abundant in Higuera and Punitaque, where it accompanies 

 minerals of copper, gold, and mercury. Its most constant companion is gold. Small veins of 

 carbonate or silicate of copper are frequently contained between the scales, and occasionally 

 red oxide of copper. Its composition is — 



Iron - - - - 70 



Oxygen -------- 30 



100 



The formula is . 

 Gothite. — Commonly found in scales or plates, disseminated or grouped, and is sometimes 

 mistaken for cinnabar. It is also found in the form of geodes, particularly in Topocalma and 



