of the native Cinnabars of Japan, &'c. 149 
acids, and precisely the same phenomena were observed as 
in the preceding analysis of the cinnabar of Japan. Upon 
the combustion of the sulphur a black residue remained, 
consisting of three grains of charcoal, which left upon in- 
cineration one grain of reddish ashes. The quantity of sul- 
phur obtained was 13°75. 
C. a. 1000 grains of hepatic sulphuret were distilled in 
the chemico-pneumatic apparatus: 34 cubic inches of sul- 
phuretted hydrogen gas passed over, without mentioning a 
part which was dissolved by the water of the receiver. 256 
grains of pure cinnabar were sublimed, and the neck of the 
retort was coated with a mixture of humid ethiops and me- 
tallic globules, from which 217 grains of mercury were me- 
chanically separated. 
b. The residue in the retort was of a charcoal black ; it 
weighed 39 grains. V/hen incinerated it left 16 grains of a 
grayish powder, which ascertains the charcoal consumed to 
be 23 grains. | 
c. This earthy residue, treated by the muriatic acid, left 
61 grains of silex. 
d. The muriatic solution, of a greenish yellow, was hy- 
persaturated by ammonia, which produced a brownish pre- 
cipitate: the liquor was of a clear blue. 
e. The precipitate, treated by potash, left two grains of 
oxide of iron. The same alkaline liquor furnished 54 grains 
of alumine ky the muriate of ammonia. 
f: Into this ammoniacal liquid, after having hypersatu- 
rated it with muriatic acid, a plate of zinc was dipped, which 
separated from it 0°20 of copper. 
Result of the above Analysis. 
Mercury . - - 818° 
Sulphur - - - 137°50 
Charcoal - - - 23° 
Silex - - - 6°50 
Alumine - - - 5°50 
990°50 
K 3 Oxide 
