247 



NATIVE CINNABAR. 



From these essays wo may conclude that 100 parts of 

 Japan cinnabar, exclusive of its foreign parts, contain 

 Mercury ... 84,50 

 Sulphur . . . 14,75 



99,25 



IT. Cinnabar of Neumaerktel in Carniola, 



Among the cinnabar mines of Europe, that of Terhitz External clia- 



- rac''crs of tiic 



on the mountain of Z/o/^/ near Neumaerktel, in Carniola, cinnabar of 



is particularly distinguished by the beauty of the specimen Carniola. 



it affords. 



The colour of this mineral is of a lively cochineal red. 

 It is found in masses of considerable size, in a compact 

 calcareous stone, of a blackish grey, and crossed by veins 

 of white calcareous spar. The faces of contact of the 

 ore against its gangue are brilliant, with a metallic aspect^ 

 the cross fracture is of little brilliancy, of a shining greasy 

 aspect. It is obscurely luminated and irregular in other 

 directions. The fragments are of an indeterminate form 

 with obtuse edges. The masses are composed of thin 

 separate laminae, striated on the faces of separation. This 

 mineral is translucid ; its scrapings or powder of a very 

 lively scarlet; it is very tender, and weighs 8,16. 



A, 100 grains of this cinnabar were reduced to very ^'^Hy^^V^^ J^' 

 fine powder, and then boiled in 500 grains of muriatic ^gy, 

 acid. Sulphurated hidrogen gas was separated, and 100 

 grains of nitric acid was gradually added. The metallic 

 part having been entirely dissolved, there remained 10,20 

 grains of sulphur of a clear yellow, which bei»g burned 

 on a test, left no residue. The muriate of barytes pre- 

 cipitated 27 grains of sulphate of barytes, containing 3,80 

 grains of sulphur. Admitting three fourths of a grain of 

 this substance to have existed in the sulphurated hidrogen 

 gas, it will follow that 1425 parts of sulphur Avere con- 

 tained in 100 of the cinnabar. 



B. Five hundred grains of cinnabar were distilled with ^^^ ^^^^ ^^ 

 half its weight of iron filings. The mercury obtained 

 from this operation, carefully coUectad, weighed 425 

 K k 3 grain?., 



