23© INFLAMMABLES. 74. Bitumen. 



Petroleum^ Liqi^d, but of a thicker confiftence than the laft and not 

 (o tranfparent, coloured. 



Bitumen liquidiufc. Syff^ nat, xii. 3. />. 109, »♦ 2. 

 ' Bitumen craffius. Wall.fyit 2. /. 90. 



Oleum montan. luteum. Wolterjd, min. 24. 



Petroleum. Cronfl^ min. fe3. 147. 2. 



Rock oil. Berkenhout outhp. 257. 



Rock oiL Sch?nei/Jer mineral. I. p, 286. 



Petrol. Kir<v:an miner aU 2. ^. 47. 



Petroleum, ^homjon chem. 4, /. 9. 



Found on the i'urface of certain fprings in Perftaj Mediae and 

 Siberia, or in coal-mines or oozing out of rocks and mineral 

 beds in various parts of Great-Britain and Europe in general : 

 it is of a thicker connfttnce than naphtha and a rather Icfs 

 pleafant fmell, is lighter than water, but heavier than alco- 

 hol : colour yellow, or with a fhade of red or green, or 

 brownifh or blackifh : when burnt it yields a foot, and leaves 

 a fmall quantity of coaly refiduum : fpccific gravity 8783. 

 By expofure it becomes of the confiilence of treacle. 



Maltha. Infpiflated, black, flicking to the fingers. 



Bitumen tenax. Syft. nat. xii. 3. p. 1 10. ». 3, 



B'tumen crafluni. Wall, fy ft. 2. p. ()2. n 3. 



Oleum montan. tenax. Wolterfd. min. 24. 



Petroleum tenax. Cronft. miner, jeSi. 148. 



Mineral Tar, Barbadoes Tar. Kirujan 2. /» 46, 



Tar. SchmpJJer miner i. ^.287. 



Mineral Tar. ThomJ'or^ chem. 4. p 9. 



Found in Colehrook dale and other coal counties in Britain^ 

 fometimes floating on lakes in Palejiine, Babylon, jirabiay 

 Perftay China, Barbadoes, and various parts of Europe, and 

 frequeatly iffuing from rocks ; is of the confiftence of treacle, 

 of a bhckiih- brown colour, opake, and has a very flrong 

 fmcJl when burnt: it feems to have its origin from the former 

 fpecies, which by longexpofure to the air, has loft its volatile 

 particles, and obtained a thicker confiftence : fpccific gra-^ 

 vity 1,1. 



f\/hmia* Black, inodorous, foftening in a low heat. 



Bitumen fubfriabile. Syft. nat, xii. 3. /.no. ». 4, 

 Mumia mineralis. UaJJelq, it. 537. 

 Mumia nativa. Ktempf am(zn. exot. fafc* 2, /.430, 

 Mahha. Kirivan mineral 2. /. 44. 

 Mineral Mummy. Schmeijfer min, 4, p. 291. 

 Mineral pitch. Thomfon chem. 4. p, to. 



Found in Perjia^ in the clifts of rocks at C/6<?r^«, on the river 



Cauca/uSi and is faid to have b^cn difcovered in Lancajhire: 



.colour blackifh-browli, foft and tough like cobler's wax when 



J the weather is warm, but brittle like pitch in cold weather: 



