( 
< 
1 ||; ■ 
J ' 1 ' ' • 
48 MINES AL 06 ICAL 
The refult of this analyfis is confequently 
Pure fulphur — — 58 grains. 
■ Tin ——* — 64 
--- Copper — — 53 
Calx of iron — — 3 
Earth of the ftony matrix 2 
180 
But as there were ft ill 60 grains want- 
ting, I chofe the following way, which 
gave me a much more juft refult. 
fa) Two drams of the fame mineral 
finely powdered was difiolvedin i-iounceof 
the above mentioned aqua-regia. There re¬ 
mained undiflolved 43 grains of fulphur, 
which during digeftion had formed itfelf 
into one mafs j fome greeni/h Ipots /hewed 
that a portion of metal was contained in 
it. After a gentle deflagration of it in an 
earthen vefiel, there remained 13 grains, 
8 grains 
f 
