250 Of the Principles 



in the cinnabar has more time duly to lay hold on 

 the filver) fuch a glafTy ore, not eafily diftinguifh- 

 able from a native fort •, as appears from the known 

 cinnabar procefTes, where ufually filed filver is ce- 

 mented with cinnabar. 



(6.) Ores may be made from the incomplete 

 metals, and from femi- metals, as tin-ore from tin 

 and fulphur, antimony-ore from regulus and ful- 

 phur, bifmuth-ore from bifmuth and fulphur, cin- 

 nabar from quickfilver and fulphur, lead -ore from 

 lead and fulphur, namely, where the fulphur is 

 in feparate parcels, conveyed on the metals in flux -, 

 and that the incorporated fulphur may not be forced 

 off again, the mixture is poured out in due time. 

 Yet, 



(7.) It is from the feweft metals fuch ores may 

 be made, as (hall refemble thofe from which me- 

 tals were originally fmelted, viz. 



(8.) A factitious tin-ore, which is ilakey, black- 

 ifh, footy, and ftellate, like antimony, nature no 

 where fupplies us with, though properly to be 

 called a fulphurated tin. 



o. From tin (fo far at le aft as I have tried) no 

 tin-ore can be made; neither can its proper mi- 

 neralifing fubftance, the arfenic, be brought to 

 Mux, and confequently to the requifite degree of 

 activity \ nor the tin duly expofed and appropri- 

 ated to it, on the fcore of its eaiier dillipation and 

 incineration. As little, 



(10.) Is a mineralifed bifmuth, or factitious bif- 

 muth-ore, found fimilar to a native ; for, though 

 it appears fmutted by the fulphur, and looks fine, 



yet 



