in the Pyrites. 133 



periments, and tho' the former is entirely impreg- 

 nated with fulpbur, yet that the latter mould not 

 bewray the leaft appearance thereof, is fomething 

 uncommon. 



Silver manifefts ftill more of it, not only that 

 incidentally lodged in other fulpbur ated ores, for 

 inftance, lead glitter, copper-ore, and fulpbur •-py- 

 rites, wbite-gcldiflj, fallow ores, and faHozv-copper- 

 ores ; but in its own peculiar ore?, as the gtaffy* 

 and, in ibme degree, the red-goldijb ores. 



As to gold, it is nor certainly known with us, 

 how far, and how readtiy fuipbur lodges in it, 

 as I have not hitherto ieen a proper gold-ore •, and 

 f as it is ftill a queftion, whether the fpangles of 

 gold, to be met with in veins, are not rather na- 

 tive, that is, only lodged there, and not in an ore- 

 ftate, or mineralifed by means of fulpbur ; yet I 

 would not maintain the impoffibility of fuch a ilate, 

 nay, rather hold, that, where 'tis reduced to ge- 

 nuine ore, it is fo, not by means of arfenic only, 

 though principally, but alio of fulpbur \ befides 

 which, there is no third body in the whole compafs 

 of the mineral kingdom, fo capable of reducing 

 metals to an ore-ftate. 



But be this as it will, fulpbur is more readily 

 found along with lead, copper, and iron, as ap- 

 pears from lead-ores, copper pyrites and ore, and 

 iron-pyrites, yet not fo peculiar to thefe metal.';, as 

 it is to regulus and quickfilvrr •, feeing iron-ore is 

 fometimes to be found without any Gii'tinguifhabie 

 Julpbur, fuch as mod iron- Rone is, in particular, 

 gic.fs bead. Copper-ore I have found without Jul- 

 pbur, as, a copper- laful from Lapland ♦, alio lead- 

 entircly without any, as appears from the 

 K 3 white 



