BITUMEN. 
GENERIC CHARACTER. 
Very inflammable; burns with a thick smoke, and exhales 
a strong smell. 
SPECIFIC CHARACTER. 
Bitumen Naphtha. B. fluidum albicans volatile maxime in- 
flammabile. Linn. Syst. Nat. Gmel. 
3. p. 2 77. 
A fluid bitumen of a whitish colour 3 vo- 
latile and very inflammable. 
Bitumen fluidissimum levissimum. Wal- 
ler. Syst. Miner. 2. p. 89. no. 1. 
Oleum montanum ignem attrahens. Wal- 
ters. Miner. 24. 
Naphtha albicans. Kcempf. Amoen. 
Exot. 273. 
Rock Oil. . . . Naphtha. Cronst. Miner. 2. p. 465. 
Kirtvan , Miner. 2. p. 42. Brogn. 
Miner. 2. p. 19. 
The different bituminous substances, such as 
naphtha, petroleum, maltha, and asphaltum, may 
be considered rather as varieties of each other, de- 
pending upon their different degrees of solidity, 
than as distinct species. We shall therefore describe 
