in the P Y ri T E s. 187 



crude-working, happens to corrode, vitrify, and 

 thus eafily carry off the lead among the fcorise, at 

 lead from the glitter-eyes always intermixed, is 

 confidered as rapacious and unkindly. 



To recapitulate briefly ; arfeniCy by means of art, 

 fiiews itfelf either a volatile, flakey, femi-metallic, 

 or a reguline body, which is a factitious fly-ftone ; 

 or a grey, white, and yellow powder, and then it 

 is called but- fume \ or a furnace -fragment (cadmia 

 fornacum) -, or a fpeife, or a kind of glaffy body, 

 and then 'tis a white and yellow cryftalline arfenic, 

 or a red arfenky that is, fandarach; or again, a fe- 

 mi-metal, and a regulus. 



Here I muft not omit explicitly mentioning a 

 matter I only incidentally touched on above, as be- 

 ing, in fome cafes, entangled with arfenky and this 

 is zinky which lodges both in foflile and factitious 

 calamy. s . 



Zinky or fpelter, cannot better be defcribed or 

 conceived than by faying, that it is that matter 

 which makes or tinges copper yellow, an effect to 

 be affirmed of no other thing in nature befides. 

 Zinky fo far as is hitherto known, is, principally, 

 in three forms •, (1.) in that femi-metallic, regu- 

 line form, properly called zinky or fpelter\ (2.) in 

 an earthy, or rather ftoney form, namely, in the 

 foflile calamy, or lapis calaminaris , (3.) in flowers 

 and fubli mates, in particular, in the above defcribed 

 white-yellowifh tender furnace-fragments. Genuine 

 formal zinky alfo called contrefaity is a femi-metah, 

 externally like lead, yet fomething brighter, inter- 

 nally mining like a mirror ; not very brittle, like a 

 bifmuth or regulus, and yet not very malleable ; 

 altogether as inflammable as a fulphur, when it 



changes 



