230 HEPATIC MERCURY. 



Analjrsis of the solid sublimate of pure cinnabar which weighed 2^56 



hepatic ore of grains. 



Mercury. m. ., i - , ^ 



c. Ine residue appeared iii the form of a coaly powder 



resembling soot, and weighed 39 grains. When burned 

 in the open air in a roasting test, it left 16 grains of 

 ashes; so that the carbon consumed amounted to 23 

 grains. 



d. The earthy residue was digested with muriatic acid. 

 Silex remained at the bottom, which after ignition weighed 

 6,5 grains. 



e. The muriatic solution, which was of a yellow co- 

 lour inclining to light green, was supersaturated with 

 ammonia; a brown viscid precipitate fell down, and the 

 fluid assumed a light blue tinge. The precipitate when 

 dissolved in an hot alkaline lixivium left the oxide of iron, 

 which was attracted by the magnet after having been 

 ignited, and weighed 2 grains. 



f. Muriate of ammonia was poured into the alkaline 

 fluid, and threw down alumine, which after ignition 

 weighed 6| grains. 



g. The other ammoniacal fluid was supersaturated 

 with muriatic acid. A bar of zinc immersed therein 

 separated 0,20 grains of metallic copper. 



On collecting the results of this analysis of the hepa- 

 tic ore of Idria we find that 1000 parts consist of 



Mercury 818 



Sulphur 137 50 



Charcoal 23 



Silex 6 50 



Alumine 5 50 



Oxyde of Copper 2 



Copper 20 



Water which served to form 

 the sulphurated hidrogen 

 gas, and other loss 7 30 



1000 



This analysis may serve to rectify the false notions 

 which have been adopted coDCcrning the composition of 



this 



