471 
Sulphuric acid was next added, to precipitate any ex- 
cess of barytes; and, this being separated by filtration, sul- 
phuretted hydrogen was passed through the solution, which 
threw down the antimony as orange tersulphuret. The 
vessel being placed upon the sand bath for about an hour, 
so as to expel any excess of sulphuretted hydrogen, the 
precipitate was collected on a filter, and exposed for a con- 
siderable time to a temperature not exceeding 212°. Being 
thus rendered perfectly dry, it was found to weigh 8°85 
grains, equivalent to 6°37 metallic antimony. 
The solution from which the antimony was separated 
was supersaturated with ammonia, and sulphuretted hydro- 
gen was again passed through it, which threw down the 
iron; upon this precipitate nitro-muriatic acid was digested, 
and the unacidified sulphur being separated by a filter, the 
acid solution was supersaturated with ammonia, which threw 
down peroxide of iron, weighing, when ignited, 0°244 grains, 
equivalent to 0°17 grains ofiron. The following, therefore, 
are the results of the analysis : 
Se et ee ED 
Pea ee ee, eS ee Sree 
|) aceite taht natal ia aa ie ag 
AG ee LOSS 
Pies ee ee eR 
100 parts therefore of the ore consist of 
a) Gish eeeptonty 
Sulphur. . . 16°36 . 1016 . 1016 . 9153 
Tread’... Geer. + 0 004 
Pee cod “aie igeyetas pons fo: MORE 1 F089 
Antimony . . 14:39 . O-111 . O-111 . 1000 
100 
The numbers in column (2) are the quotients obtained by 
dividing the corresponding ones in column (1) by the atomic 
