A SYSTEM OF 
iL It is unalterable in air, water, and fire. 
It difibives in the acid of nitre, and alfo 
by boiling in the acid of vitriol. 
/. If precipitated out of the acid of nitre 
with the common fait, or with its acid, it 
unites fo ftrongly with this laft acid, that 
it does not part from it, even in the fire 
itfelf, but melts with it into a mafs like 
glafs, which is called luna cornea, 
z- It . does not unite with the fcmi-metal 
nickel, during the fufion. 
A It amalgamates eafiiy with quickfilver. 
It is in the dry way dilTolved by the liver 
of fulphur. 
k. It has a flrong attraftion to fulphur, fo as 
readily to take a reddifh yellow or black 
colour, when it is expofed to fulphureous 
vapours. 
l. It has no attraflion to arfenic*, whence 
when the red arfenical filver ore, or Roth^ 
gulden Ertz of the Germans, is put into 
the fire, the arfcnic flies off, and leaves the 
fulphur (which in this compound was the 
medimn uniens) behind, united with the 
filver in form of the glafs filver ore, or 
glafs ertz. 
It is not dilTolved by the glafs of lead, 
and confequently it remains on the cuppeL 
n. It is exhaled or carried off by volatile me- 
tals and acids, as by the vapours of anti- 
mony, Zink, and the acid of common 
fak. 
0 , It melts eafier than copper. 
SECT. 
