iNTROBUCTION. each other,- ■with the tranfkions of minerals. It re- - prefents the alliances of filver with gold, antimony, aifenic, filver, copper, iron, tin, lead, fylvan, and mercury. In the following fe&ion I fhall detail the method \vhich is followed in the arrangement of thefe diffe rences, or dalles, genera, fpecies, fub fpecies, and kinds. •< 5* In the arrangement of the members of the fyf- ^ be tent, we firff begin with the moft general, and pro- in the ar ~ ceed to the more fpecial. Secondly arrange them as of the much as pofnble i n a n a tura i order ; and thirdiyj t ie higher divifion, as in the genera and fpecies, we place the characteriftic ones firit, and allow the other e . b c ^ ara £lerifti c to follow in the order of their affi- a fT^- -^ U£ >v ^ en fuhes occur that do not pofTefs fuch p ^ ace l ^ e charafteriftic member in the ino- nc t] 3n arran & e *I le others on both fides accord-" nn '11 ? y appr ? ach more or lefs to it. We fhall th p W , 1 U late met ^ 0 ^ hy giving an account of f ft " rran S ernen t of the different members of-the lyftem. from ri ° f eari h minerals is diffinguifned ciumari <04. hca'v v rS ,„ by ” gC " eral " 0t colo f *• 1 ’ P°H e ding ufually white or light neral5 ' imhl '•* muc * 1 ^Ilpoled to crvftallize, uninflam- m a low temperature, and infipid and inodour- .. } 1S l^ acc d fir ft in the fyftem by reafon of its of tl IClt ^ 5 T COnm . U,tin S g rea ter part of the cruft , 1C Cart ’ an ^ tts being the repofitory of the mi nerals of the other claffes. The