300 = Analysis of a new. Variety of Ore of Antimony): 
fragments: it is easily pulverized. The specific gravity of @ 
specimen freed by washing of a brown oehre proceeding from 
efflorescent sparry iron is 6°5S0. 
A. a.) 300 gras of ore, purified from iron as much as 
possible, were brought in contact with a mixture of five parts of 
muriatic acid and one of nitric acid. When cold, the solution 
of the metals had already taken place in a great measure, and 
the sulphur was separated. This residue, when treated again with 
the saine acid cold, mixed, and washed afterwards with alcohol, 
gave 51 grains of dry sulphur. When burnt there remained ten 
grains of a blackish residue, which was almost wholly dissolved 
in the above mixed acid by means of a slight heat. 
i.) The solution was concentrated in a retort, and the liquor 
when highly concentrated was diluted with water, which occa 
sioned an abundant white precipitate. 
The liquid decanted from the precipitate was concentrated 
again, decomposed afterwards by water, and the new sediment 
added tothe former. This precipitate, which at a cursory glance 
might have been confounded with Algarotti’s muriate of anti- 
mony, was recognised to be an arseniate of antimony. 
c.) After having separated the precipitate from the solution, 
it was again concentrated, and appeared then to be of a deep 
green. Ammonia in excess was poured into it, which redissolved 
the precipitate except the brown oxide of iron, the weight of 
which was found, after washing and calcination, to be thirteen 
grains and a half, 
d.) The ammoniacal solution was evaporated to dryness, and 
the saline mass was afterwards made slightly red-hot in a porce- 
lain crucible, in order to decompose the neutral ammoniacal salt. 
The residue of muriated oxide of nickel, which presented a heap 
of shining micaceous lamine of a brow mish yellow, was wholly 
dissolved in the muriatic acid by means of heat, yielding a solution 
of a grass green colour. By means of caustic potash, the oxide 
of nickel. was precipitated from it, which.in the state of hydrate 
was of an apple-green colour. This precipitate when well 
washed, dried, and “made red-hot in a platina crucible, left 933 
grains ‘of pure oxide of a schistous gray colour, In order to 
determine the relation of this oxide to metallic nickel, we dis- 
solved in nitric acid 100 parts of pure nickel obtained by re- 
duction of the chrysoprase and the pimelite, and the solution 
was precipitated by. means of potash. The precipitate when 
washed, and made red-hot in a platina crucible, yielded 132 and 
a half of oxide of nickel : accor ding to this, the above 933 grains 
of oxide of nickel yielded 703 grains of metallic nickel. 
B. The precipitate J.) composed of arseniated oxide of anti- 
mony 
