of the P y ki T e s. 251 



yet it not only does not exhibit the texture, but 

 even the appearance of the natural mixtion is want- 

 ing, by which it mould hold no fulphur ; though 

 this experiment fhculd, on other accounts, be re- 

 peated, and more accurately examined. 



( 1 1.) That procured from lead and fulphur comes 

 tolerably near a foiiile lead glitter, or ore ; only it 

 is very irnall grained, and, if not removed almoil: 

 inftantaneoufly from the fire, proves very footy 

 and powdery. 



(12.) The reduclion of a metal to the form of 

 an ere, even its native form, is better lecn in an- 

 timony, which is procured from i?egulus and ful- 

 phur, but more fine- grained than a foflile anti- 

 mony commonly is ; and would certainly be more 

 coarle-grained, if art, like nature, could take the 

 proper time, and the operation not be hurried. 



(13.) 'Tis in the preparation of cinnabar, that 

 is, the mineralifation of quickfilver, that art, at 

 length, moft perfectly approaches to nature, info- 

 much, that between a factitious and a native cin- 

 nabar, very little, if any diftinction appears. 



'14.) On the contrary, copper cannot be mine- 

 ralifed, or not fo as to be like a native ore, for that 

 procured from fulphur and burnt or calcined cop- 

 per (es ufium) is no longer a metal, only as it 

 contains fulphur, it is called a mineralifed copper; 

 and, after burning out the fulphur again, nothing 

 remains but a metal burnt out, and reduced to an 

 earth; i\nd where in nature do we find fuch a 

 fort? 



• 



(.1*0 No 



