308 Elements of Mineralogy. 



mercury will remain, and both fhould be pre- 

 cipitated by the marine acid ; the precipitate 

 wafhed in cold water and dried fhould be 

 .weighed, and then digefled in hot water, 

 the marine mercury will be diflblved ; the 

 refiduum, containing only the marine filver, 

 fhould again be wafhed, dried and weighed ; 

 the difference between the former and prefent 

 weight gives the quantity of marine mercury, 

 and the metallic contents of each may be de- 

 duced by the rule of proportion from the 2d 

 table. 



SPECIES II. 



Mineralized by the aerial Acid. 

 Native precipitate per fe or Ca/x of Mercury. 



4. This is faid to have been lately found in 

 Idria in- hard compaft mafles of a brownifh 

 red colour, and granular texture, mixed with 

 fome globules of native mercury. By diftil- 

 lation it is recovered in its running form*. 

 100 parts of it afford 91 of running mer- 

 cury. Roz. Jan. 1 784, p. 61. 



SPECIES III. 



Mineralized by tbe Vitriolic and Marine Acids. 

 Vitriol and Marine Salt of Mercury. 



5. Mr. Woulfe firft difcovered thefc: falts at 

 Obermofchel, in the dutchy of Deuxponts: 



they 



