E lamination of Ores of Iron. 381 



o. The earthy residuum was now examined; first, with the 

 microscope, but little of its character could be relied on ; it 

 had, however, the appearance of fragments of felspar, and 

 was easily powdered and gritty to the teeth. 



(6.) The earth was now reduced to a fine powder, and fused 

 with potassa in a silver cup. The fused mass was uffer- 

 ed to cool, then dissolved in pure distilled water and filter- 

 ed; (the potassa had nearly dissolved, only leaving a small 

 trace of iron); then to the alkaline solution was added muri- 

 atic acid, it let fall a precipitate of silex, which weighed 15.75 

 grains, having lost 75, which appeared to be alumine. 



(7.) The precipitate of oxide of iron (3) was then dissolved 

 in muriatic acid, and neutralized with pure water of ammonia, 

 then precipitated with benzoate of ammonia, forming a ben- 

 zoate of iron, and a compound solution of muriate of manga- 

 nese and ammonia, if any manganese was present. The ben- 

 zoate of iron was then separated from the solution by the 

 filter. The clear solution that was supposed to contain the 

 manganese, was then boiled to dryness, and the muriate of 

 ammonia sublimed, leaving the manganese, which when dried 

 weighed 2.4 grains ; it was then fused with borax and nitrate 

 of potash, giving its usual rose colour with a tint of violet. 



Hence it will appear this ore contains of 

 Red oxide of iron - 



Manganese, - 



Silex, _____ 



Alumine, --..--.- 



loss 



No. 4. Iron ore from Moriah, Essex County, New-York 

 Variety No. 1. 



Character. Its powder is blackish, with a shade of purple ; 

 magnetic ; specific gravity 4.92 ; has a greyish mineral im- 

 bedded in it in grains, the size of fine sand. 



