334 Chemical Analysis of Meteoric Iron. 



the peroxide of iron was thrown down by means of liquid ammo= 

 nia. When the precipitate had subsided, the whole was thrown 

 on a filter, and the peroxide of iron was thoroughly washed, 

 dried, ignited in platina capsule, and weighed = 23.5 grs. perox- 

 ide of iron = 16.296 grs. metallic iron. 



The solution, which had passed the filter, was of a clear blue 

 color, with a slight amethystine tint, indicative of nickel. This 

 solution and the mingled washings were evaporated in a glass ves- 

 sel to a small bulk, and then treated, while warm, with a hot so- 

 lution of pure potash, when a dense bulky green precipitate of the 

 hydrate of nickel was thrown down, which being collected on a 

 filter, washed, thoroughly dried and ignited in a platina crucible, 

 weighed 8.8 grains = oxide of nickel = 6. 927 grains metallic nickel. 



Analysis — 2d specimen. A fragment of the meteorite, weigh- 

 ing 50 grains, was found to have a sp. gr. =■ 6.500. 



It was placed in a green glass flask, — perfectly pure nitric acid 

 was poured upon it, and heat was gradually applied until the 

 solution was completed. It was then diluted with pure distilled 

 water, and a solution of nitrate of silver was added, when an 

 abundant curdy white precipitate of chloride of silver took place. 

 When the operation was complete, I filtered the solution, col- 

 lected the washed chloride of silver, and dried and fused it in a 

 small porcelain capsule. It weighed = 3 grain s = chloride of sil- 

 ver =0.74 gr. chlorine, or 0.76 hydro-chloric acid. 



The solution was then cleared of nitrate of silver, by means of 

 hydro-chloric acid, and filtered. Then muriate of ammonia being 

 added, the peroxide of iron was precipitated by pure ammonia, 

 and after washing, drying, and ignition, weighed = 48 grains = 

 33.28 grs. metallic iron. 



The oxide of nickel was precipitated by means of a solution of 

 pure potash, and when collected, washed, dried, and ignited, 

 weighed 15.8 grains oxide of nickel = 31.6 per cent. =24.708 per 

 cent, metallic nickel. After the separation of the metallic oxides, 

 the solution was treated by means of a solution of acetate of ba- 

 rytes, and a white precipitate of sulphate of barytes was formed, 

 which weighed, after washing and drying, = 27 grains = 2 grs. 

 sulphur. 



The presence of chrome and of manganese having been indi- 

 cated, I took a separate portion of the meteorite, weighing 10 

 grains, dissolved it in hydro-chloric acid, adding sufficient tar- 

 taric acid to retain the oxides in solution, neutralized the acid 



