'in the Pyrites. 203 



fentially in the red-goldifh ore, as appears by the 

 fmell in roafting, by the poifon-meal procured in 

 fublimation, alfo from its relation to iron : feeing it 

 does no: part from, but rather runs together with it 

 into a cake, without letting fall the filver, like as a 

 fulphurated filver does ; for inftance, the glaffy 

 ore, after the manner of an antimony. And here 

 it is worth remarking, that the red-gcldiflj ore ufu- 

 ally manifefts itfelf in the fire no other than as a 

 fpad, by its ftarting and fpringing. 



Arfenic lodges in white-goldifh ore, fallow ore, 



fallozv- copper and white ores: the riift, on the fcore 



of its filver-yield, belongs to the clafs of filver ores ; 



the others, on account of their copper-yield, to 



that of copper-ores. 



Arfenic in the cobalds, from which the fmalt is 

 prepared, and in the kupffer '-nickels ', which are 

 allied to cobalds, is all in all, as not to exhibit the 

 leaft fulphur, as fuch. The finer tin-ores, called 

 zinn-graupen (not the coarfer, called zwitter, fuch 

 a mixed mafs being never without ar J enic -pyrites^ 

 wolfram, &c. and yielding with us the greateft 

 quantity of arfenic -meal for the arfenic-huts) befide 

 their metal, confifl of nothing elfe. 



There are alfo arfzniral lutes, clays, or marl- 

 earths \ as here in the Herrn grund at the Befhert- 

 g'uck. In ftone I have not hitherto difcovered any, 

 DOT, I cannot fay, I ever examined them with that 

 view, tho' I have often for fulphur. In water we 

 may rather expect to find fulphur than arfenic ; yet 

 there are inftances of arfenic's infinuating into mi- 

 neral waters ; and it may, by art, be incorporated 

 with water, in conjunction with fulphur and vi- 

 triol, 



