FALLEN ON THE EARTH. f)5 



The pyrites, although certainly prefent, were not cryflal- 

 Iized in fiich groups as in the preceding ftonej nor could they 

 be Separated by mechanical means. 



The attractable metal was eafily feparated by the magnet ; iron and nickel 

 but 8| grains only were coMeded. I treated them with nitric. as ^ n ^e forme? 



•j j • • j- r tvt i • ,nfta ncefrom 



acid and ammonia, as in a preceding cale. JN early one grain the attraaablc- 

 of earthy matter was infoluble ; the weight was therefore re- metaI * 

 duced to rather lefs than 8 grains. The oxide of iron, preci- 

 pitated by ammonia, weighed 8 grains ; and the faline liquor 

 gave abundant indications of nickel. As 8 grains of thisoxid-e 

 of iron contain nearly 6 of metal, the quantity of nickel, in 

 the bare 8 grains, may be eftimated between 1 and 2 grains. 

 Some globular bodies were extracted, but too few to analyze. 



Since the pyrites could not be feparated, I collected 150 AnaJyfis of the 

 grains of the ftone, freed from iron by the magnet, and as ex- ftone f reed trom 



mt i- t^i r • _ magnetic metal 



empt as pofnble from globular bodies. Tnele 150 grains, I and globular 

 firft digefied with muriatic acid, that the pyrites might be de- P am * 

 compofed, and every thing taken up which could be diflblved 

 by that menftruum. A very decided difengagement of ful- 

 phureted hidrogen gas was occasioned. When the acid could 

 produce no further action, I colle&ed the undiflblved matter 

 on a filtre, and boiled it with the moil concentrate nitric acid, 

 in hopes of being able to convert the fulphur, previouily libe- 

 rated, into fulphuric acid ; but my endeavours were fruitlefs ; 

 for, upon the addition of nitrate of barytes to the nitric folu- 

 tion, rendered previoufly tranfparent, a very infignificant 

 quantity of fulphate of barytes was obtained. The Turpi us of 

 barytic nitrate was removed by fulphate of potafb. I next 

 completely edulcorated the mafs which remained infoluble, 

 after the action of the muriatic and nitric acids ; and, adding 

 the water of edulcoration to the muriatic and nitric liquors, 

 evaporated the whole for filica. I then fubmitted the mafs, 

 undiflblved by the acids and the water, to the treatment with 

 potafh, muriatic acid, and evaporation, which was, in the 

 firft inftance, applied to the ftone from Benare-F. The firft 

 precipitation was, as in that analyfis, alfo effected with car- 

 bonate of potafh ; but, inftead of endeavouring immediately 

 to extract alumina, I ignited the precipitate, that the alumina 

 or filica remaining might be rendered infoluble. After the 

 ignition, I feparated the oxide of iron with vet;y concentrate 

 muriatic acid ; and the earths, which were left perfectly white, 



I heated 



