3f2 ANALYSIS OF NATIVE IRON, 



fused with pure potash, when it dissolved in watef^ 

 depositing pure silex on the addition of muriatic 

 acid. 



C. Into the solution A, with excess of acidy 

 pure ammonia was poured in excess, (after having 

 ascertained that it neither contained copper nor 

 lead) ; a precipitate was procured, which, when 

 heated in contact with the air, weighed 37 grains. 



D. The filtered solution C, did not give the 

 slightest indication of metallic matter to hydro- 

 sulphuret of potash or tincture of galls. Not a 

 trace of nickel or magnesia could be discovered. 



A similar quantity was fused to dispel volatile 

 matter, and dissolved in dilute nitric acid, which 

 it did with great rapidity, and the copious evolu- 

 tion of nitric oxide. The residue was boiled in 

 muriatic acid, which dissolved all but one grain, 

 which proved to be silex. The same process was 

 followed as with the first portion, and with the 

 same results, except the loss of — ^ grain. It 

 is therefore iron, nearly pure, consisting of 



Iron, - 16^ 



Silex, - 1 



Loss chiefly sulphur about, Oi 



