OBSERVATIONS. 
55 
§ 7 - 
The Solubility of the tin contained in 
this mineral in aqua regia and marine 
acid, which is not the cafe with that of 
the common calciform tin ores, or with 
any Strongly dephlogifticated tin calx, is a 
fuflicient proof, that the tin is in this 
cafe united to the fulphur, in fuch a State 
as to approach metallic tin. I think this 
in general to be the cafe with all other 
mineralizations. The following experi¬ 
ment is ftill more convincing. 
(a) Half an ounce of fulphurated tin 
ore, mixed with the fame quantity of 
corrofive fublimate, was put into a fmall 
retort, a receiver was applied, and the 
retort placed in a fand bath. When 
moderately heated, a heavy fluid with 
white heavy vapors came over, and by 
increafing the heat, a fublimate of a grey 
yellow colour, moftly crystallized in 
E 4 needles. 
