23?- INFLAMMABLES. 74. Bitumen. 



Gagas* Compad, deep black) opake, of a conchoidal texture 

 Ihining internally, burning with a greenijh flame. 

 Bitumeu. folid. natans. Syft. nat. xii, 3. ^. 1 1 1. «. 8. 

 Bitumen duriffimum. Wall.fyjl. 2. p. 106, n 7. 

 Gaga5. f'^ogel. min. 327. Baum. tnin. \» p. 34. 

 Gag'^t. Schms'tjfer miner i. p. 289. 

 Jet. Kir 10 an z.p 64. Thomfon chem. 4. p. 12. 

 Jet. Soiverby Brit. min. /. 51. Brand, fofs. fig, 121. 



Found in varif-us parts of Great-Britain, France, Spain, Germany^ 

 Sec, particularly on the coaft of Lcwe/Ioft in Suffolk, with im- 

 prefiions of Cornu Ammonis, fometimes in layers, but gene- 

 rally in kidney-form malTes of various (izes : colour full gloiTjr 

 black, glalTy internally: texture llriated, and conchoidal: 

 when cold has no odour, but when heated emits an odour 

 refembling that of afnhalt: leadily inflames and lofes durivg 

 combuftion 14 gr.uns in 20, leaving an earthy refiduum : iu 

 thin pieces will float for a fliort time on the water: fpecific 

 gravity 1,259. ^^ '^ formed into buttons, beads, and other 

 tjinkets: when heated or rubbed hard will attract light 

 bodies, 



JmpeUtei, Black, opake, brittle, does not ftain the fingers, burn? 

 with a bright white flame like a candle. 

 Bitumen humi. Syft. nat, xii. 3. p. i 10. «. 6 ? 

 Bitumen terra mineralis. WalL jyjl, 2. p.,()6. », 5. 

 Bituminous wood, Bovey coal, ^chmeijjer i^ p^ 2(^^, 

 Cannel coal, Bovey coal. Kir-wan z» p. 52. 

 Cannel coal. Thom/on chem, j\.. p. 12. 



1. Earthy internally. 



2. Compaft and glofly throughoat. 



Found in LancaJIA;-^ ^ Ireland, and many parts of Europe, of a 

 compaft flaty texture and conchoidal fracture : it kindles 

 eaflly and leaves a ilony or footy refiduum of a grey colour : 

 it is fufceptible o{ a fine polifli, and like jet may be made into 

 trinkets: fpecific gravity i,z^z. to 1,426. 



Lithan- Opake, black, brittle, burning with a blackifh or grey 

 ihrax, fmoke and leaving black or grey afhes and cinders* 



Bitumen fliiilofum. Syft, nat. xii, 3. ;>. 1 1 1. «. 7. 

 Bitumen lapideum. -Wall, fyfi, 2. p gS,n.6, 

 Coal. Kirnvan miner. 2. p. ^i^ SchmeiJJer i* p, 2()2» 

 Common coal. Thom/on chem. 4. p. 14. 

 Pit coal. So^erby Bnt. min, tab. 48, 49. 



1. Of a flaty texture. 



2. Of a rather conchoidal texture. 



