i54 A SYSTEM OF 



this earth quickly volatilifes ; fo that the 

 nature of it is not yet known. 



It is found in Moffgrufvan atNorbero-, 

 and in Grengierberget, both in the pro- 

 vince of Weftmanland, and alfo in 

 other places *. 



SECT. CLI. 



'4. Mineral Phlogifton, or Bitumen, united with 

 the vitriolic acid, Phlogifton minerale acido 

 *vitriolijunffum. Sulphur or Brimftone, Sulphur* 

 This is very common in the earth, and 

 difcovers itfelf in many and various forms. 

 It is found, 

 A* Native Sulphur, Sulphur nativunt. 



In this the two conftituent parts are mixed 

 in due proportion in regard to each other, 

 according to the rules of that attraction 

 which is between them ; it is eafily known, 



1. By its inflammability, and by its flame. 



2. By its fmell, when burnt; and, 



3. By its producing a liver of fuiphur, when 

 mixed with a fixed alkali, like that made 

 from artificial fuiphur, 



It is found 



a. Pellucid, of a deep yellow colour. 



b. Opake, white and greyifh. 



Thefe are found in Siberia,atBevieux 

 in Switzerland, and at Solfatara near 

 Naples. It is often found on limeflone, 

 which the vitriolic acid has left un- 

 touched, having a ftronger attraction to 



* The. fubftance which rifes, and then falls into the receiver 

 during the defoliation of this foflil pitch, is entirely the fame 

 as the common natural liquid rock-oil, Seel, cxlviii. 



the 



