DANVILLE (ALA.) METEORITE. 365 



iron, and the earthy minerals. As in the case of most mete- 

 orites, the earthy minerals were so intermixed that it was 

 impossible to separate the different varieties, three of which 

 were easily traceable by the eye. 



The iron, separated with great care from the pulverized me- 

 teorite, constitutes 3.092 per cent, of the entire mass, and an 

 analysis furnished 



Iron 89.513 



Nickel 9.050 



Cobalt 521 



Copper minute quantity 



Phosphorus 019 



Sulphur 105 



99.208 



The sulphide of iron detached very carefully from the mass 

 of the meteorite gave 



Iron 61.11 



Sulphur 39.56 



100.67 



Which corresponds with the protosulphide of iron, Fe S. 

 Whether it contains any of the sulphide known as troilite 

 I am not prepared to say. 



The stony minerals were freed as much as possible from 

 iron and pyrites, and one gramme treated with ten grammes 

 of hydrochloric acid on a water-bath, and evaporated nearly to 

 dryness, then filtered, and the filtrate well washed. After 

 which the residue in the filter was warmed with a solution 

 of caustic soda, to dissolve any silica belonging to the portion 

 dissolved by the acid. It was then filtered again and washed. 

 The result was 



Soluble portion.... 60.88 



Insoluble portion .• , 39.12 



The treatment by a solution of caustic soda or potash is of 

 importance for a correct result, as otherwise a portion of the 

 silica of the decomposed minerals will be estimated with the 

 portion that is undecomposed. 



The insoluble portion of it was analyzed; for, although the 

 analysis made in this way can not furnish any positive indi- 

 cation in regard to the true mineral constitution of the mete- 



