MINERALOGY, 
in the fame manner as the Naphta, frorti 
feme wells in Italy^ and in a deferted 
mine at Ofmundfberget in the province 
of Dalarne : at this 1 aft-mentioned place 
it is found in fmall hollows in the lime- 
ftone, as refxn is in the wood of the pines. 
SECT. CXLIX. 
B. Thick and pitchy Rock-oil, or Barbadoe$ 
Tar, Petroleum tenax^ Maltha. 
This refembles foft pitch. 
It is found in Moftgrufvan, at Nor- 
berg, in the province of Weftmanland, and 
the Dead Sea in the Holy Land. 
SECT, CL. 
1 
Hardened Rock-oil, Petroleum induratumi 
Foffil Pitch, Pix montana. 
j. Pure, Afphaltum, 
This leaves no afli or earthy fubftance 
when it is burnt. 
It is found at Finnberget, in the pa- 
rifti of Grythytta, in Weftmanland. 
From this or the preceding fubftance, 
it is probable, the afphaltum was pre- 
pared that the Egyptians ufed in em- 
balming their dead bodies, and which is 
now called Mummia. 
2 . Impure, Pix montana impura* 
This contains a great quantity of 
earthy matter, which is left in the retort 
after diftillation, or upon the piece of 
charcoal, if burnt in an open fire ; it 
coheres like a flag, and is of the colour 
of black lead : but in a calcining heat 
