in the Pyrites. 201 



« As one or other circumftance might eafily miflead 

 us to a fa lie conclufion •, for inftance, that this red- 

 golsjjh ore is highly, nay, I had almoft laid, al- 

 lowing for its filver contents, entirely arfenical^ 

 and not fulphureous : further, that another fiiver- 

 ore, as the g!affy\ which has only fulphur, and no 

 brie fox its mineralifing caufe, is, however, not to 

 be found there •, (un!efs it mould happen to be con- 

 veyed thither, as things the moil foreign may, from 

 other veins) whereas otherwife it is not uncommon 

 for red goIdiJJj and glajfy ores, readily to lie near, and 

 to be entangled in each other: moreover, that other- 

 wife no fulphur-ore is found there; omitting other 

 circumftances which might be mentioned ; as, that 

 -goJdifh lodge in this poifon-ore as fo many 

 kernells in their (hells. This, however, I muft here 

 fay for arfenic (not out of any alchemical views, but 

 only in regard ro its univerfal treatment in ore-fmelt- 

 ings, and the like, and from fome experience 1 have 

 had of it) that it wants not a great deal to become 

 a filver, 



(3. J Arfenic may be fuppofed both to lodge in, 

 and to be actually educed from foffile fandarach ; 

 as it is certain, iandarach confifts of that and fome 

 fulphur. This mineral is alfo found in the foiTile 

 orptment, partly kidney wife, partly as fo many 

 fibres, alio feparately in fifTures in the barren rock, 

 as I have had it out of the fulphur-groqve^, both 

 from Cremnitz in Hungary, and from Turkey, 

 : from Frantz-Coronzay, near Tobagi, by 

 Neufohl, in Hungary; affording the fame hints to 

 the enquirer, with refpect. to us origination, as 

 were above given for the fofTile white arfenic. Now 

 both forts, 'tis true, efpecially the fecond, are 

 things very rare and uncommon in mineral collec- 

 tions -, and I dare affirm, a perfoh intelligent in the 



natui 



