tsi A SYSTEM OF 
this earth quickly volatilifes ; fo that the 
nature of it is not yet known. 
It is found in MolTgrufvan atNorberg, 
and in Grengierberget^ both in the pro- 
vince of Weftmanlandj and alfo in 
other places 
SECT. CLL 
■4. Mineral Phlogifton, or Bitumen, united with 
the vitriolic acid, Phlogifton minerale acido 
vitrioli jun5ium. Sulphur orBrimftone, Sulphur. 
This is very common in the earth, and 
difeovers itfelf in many and varioas forms; 
It is found. 
Native Sulphur, Sulphur natimm. 
In this the two conftituent parts are mixed 
in due proportion in regard to each other, 
according to the rules of that attraftion 
which is between them ; it is eafily known, 
1. By its inflammability, and by its flame. 
2. By its fniell, when burnt ^ and, 
3. By its producing a liver of fulphur, when 
mixed with a fixed alkali, like that made 
from artificial fulphur. 
It is found 
a- Pellucid, of a deep yellow colour. 
h, Opake, white and greyifli. 
Thefe are found in Siberia,at Bevieux 
in Switzerland, and at Solfatara near 
Naples. It is often found on limeftone, 
which the vitriolic acid has left un- 
touched, having a ftronger attraftion to 
^ The fubHance which rifes, and then falls into the receiver 
aluring the diftillation of this fo^l pitch, is entirely the fame 
as the comiuoD natural liquid rock-oil, Sed. cxlviii. 
the 
