Analysis of the Tennessee Meteorite. 327 



water used to detach it from the silver crucible, indicating the pres- 

 ence of a trace of manganese ; it was acidulated with nitric acid in 

 excess, and by evaporation of the solution to a dry gelatinous mass, 

 and subsequent treatment with acidulated water, the silica was sepa- 

 rated, which, after edulcoration and calcination, weighed 1.20 gr. 

 on 3 gr. or 40. per 100. 



B. The solution (A), from which the silica had been separated, 

 was of a pale green color. Submitted to ebullition with an excess of 

 sub-carbonate of soda, it afforded a dark reddish brown precipitate, 

 which, treated in the gelatinous state with oxalic acid, according to 

 the process of Laugier, and then digested in ammonia, proved to be 

 free from cobalt, and yielded 0.065 gr. of protoxide of nickel on 3 

 gr., or 2.166 per 100. 



C. The residue insoluble in ammonia, was dissolved in muriatic 

 acid, and tested with oxalate of potash, it proved to be free from 

 lime. By phosphate of soda and ammonia, it yielded a precipitate 

 of ammoniacal phosphate of magnesia, which, together with that sub- 

 sequently obtained from the oxalic solution, amounted to 1.94 gr., 

 equivalent to 0.715 gr. of magnesia on 3 gr. or 23.833 per 100. 



D. The oxalic solution (B), was boiled with an excess of sub- 

 carbonate of soda; the reddish brown precipitate which ensued 

 when calcined with caustic potash, and treated with water, gave a 

 solution of a lemon yellow color, which shewed that it had carried 

 down with it some chrome ; the alkaline solution was exactly neu- 

 tralized, with muriatic acid, by which means the alumina was ascer- 

 tained to be accurately separated ; when washed and calcined, it 

 weighed 0.074 gr. on 3 gr. or 2.466 per 100. 



E. The solution from which the alumina was separated, was con- 

 centrated and boiled with muriatic acid, when chlorine was evolved : 

 when ammonia was added, there was produced a precipitate of 

 proto-hydrate of chrome, which, by calcination, yielded 0.025 gr. of 

 protoxide of chrome on 3 gr. or 0.833 per 100. 



F. The residue insoluble in potash (D), was dissolved in muri- 

 atic acid, and after the addition of sub-carbonate of ammonia, a pre- 

 cipitate ensued, which, when calcined, afforded 0.885 gr. of per 

 oxide of iron. 



On testing 3 grammes of the pulverized mineral with a magnet, 

 there were separated 0.36 gr. of metallic grains, which, owing to the 

 small quantity of sulphur, nickel, and chrome, may, without com- 

 mitting any important error, be regarded as the quantity of metallic 



