of a Meteoric Stone, 33 



ti on, -manifests itself even in the smallest particles isolated 

 by trituration. 



I found it even in the globulous bodies which are first 

 mentioned. 



Pieces of this stone weighed from six to even 100 pounds, 



ANALYSIS. 



Having ascertained, by preliminary essays, that this stone 

 contained chrome, nickel, iron, manganese, lime, magnesia, 

 silex, alumine, and sulphur; I employed the following me- 

 thod of separating each of these substances. 



1° 100 grains of this stone, from which the metallic iron 

 was isolated, by means of the magnetic needle, after being 

 pulverised, were treated with a considerable quantity of 

 water, through which was passed a current of oxygenated 

 muriatic gas : by this means, the sulphur being converted 

 into sulphuric acid, by the oxygen of the oxygenated mu- 

 riatic acid, sulphates and muriates were obtained. 



2°. The whole was evaporated to siccity, and treated 

 with two parts of alcoholic potash : after fusion the mass 

 presented a fallow colour, and its dissolution in water was 

 of a fine yellow. 



3°. The portions of the mass, which remained undis- 

 solved in water, were dissolved in an excess of muriatic 

 acid ; and being evaporated to siccity, I separated the silex, 

 which after calcination weighed 41 grains. 



4°. Into the muriatic acid was poured carbonate of potash 

 in excess, which formed an abundant precipitate after an 

 hour of ebullition. 



5°. The liquor contained sulphate and chromate of potash : 

 after being made acid, it was precipitated by muriate of 

 barvtes in excess, and there was obtained sulphate of bar\ tes, 

 corresponding to 2-^- of sulphur : and saturating afterwards 

 the excess of acid by an alkali, I obtained chromate of 

 barytes, corresponding to 2^- of chromic acid. 



6°. The precipitate, No. 4, was submitted (still in a 

 humid state) to the action of alcoholic potash, and after 

 filtration, the liquor gave, by means of the muriate of am- 

 monia, a grain of alumine. 



7°. Ammonia was poured into the remains of the pre- 

 cipitate, after having dissolved it in an excess of muriatic 

 acid. The oxides of iron and manganese were precipitated, 

 and the lime and magnesia remained in dissolution. 



8°. The precipitate was isolated, and the lime separated 

 from the magnesia by the oxalate of ammonia, which, 

 after calcination, weighed three grains. 



Vol. 30. No. 147.t/% 1810. C The 



