248 Of the Principles 



When I would try to make ores from metals, 

 and, as it were, re- produce them, I cannot, for 

 that purpofe, employ the principles, or fimple 

 particles themfelvesi of which they are formed by 

 nature in the bowels of the earth, as thefe, in their 

 feparatecl iiate, are no objects of our fenfes ; but I 

 am obliged to ufe metallic earths, or formal me- 

 tals, alfo real fulphur and arfenic, in order either 

 to 'arfenicate, or fulphurate the former, and thus 

 bring them to the form of an ore. In fome in- 

 ilances I have hit tolerably well, in fome but in- 

 differently, and in others not at all, as will appear 

 from what follows. 



(1.) From fome univerfal earths, which neither 

 are, nor were actual ore or metal, metals may be 

 made; for inltance, from foftile calamy, iron, in- 

 deed in no confiderable, and zink, in a large 

 quantity ; not only when the proper body, where- 

 in it may incorporate, namely, copper, is expofed 

 to it, but even without the addition of metal, bare- 

 ly upon the application of the metallifing, fatty 

 matter, with proper care and attention, that the 

 matters be not burnt out and reduced to afnes. 



(2.) From metallic earths metals may again be 

 .made, and, in part, fuch as they already were, as 

 from lead-afh, tin am, &c. lead, tin, &c, name- 

 ly, by re-incorporating the fatty, metallifing fub- 

 ffance, or phlogifton, which operation is called re- 

 du£lion\ partly, what they were not before, as fuf- 

 ficiently appears both from gold and filver, which 

 may, in different manners, be educed from diffe- 

 rent incompleat metals, and femi- metals, parti- 

 cularly, bifmuth, tin> regulus, lead, and quick- 

 filver. 



(f .) From 



