146 Queries concerning Amber . 
where an acid Spirit can be found for the' 
fixing and confolidating thefe Principles ? do 
not the Choak Damps in moil Coal Pits prove 
the Exigence of fuch a Spirit within the 
Bowels of the Earth ? do not the Fire 
Damps, frequent in the fame Pits, likewife 
prove the Abundance of a bituminous Va¬ 
pour inflammable like Naptha ? 
Quere . 7. Do not the Brittlenefs and 
Lightnefs of Coal, Jet, and Amber, fome- 
what countenance the Opinion of their be¬ 
ing of an oily and bituminous Compofition ? 
and if fo, what Fluids does the Earth afford 
lb likely to conflitute thefe Subfiances as * 
FoJJil Fitch, Petroleum , Oleum Ferres, and the 
different Sorts of Naptha I 
* Captain John Foyntz , in his Account of the Ifland of 
Tobago, p. 3S, fays, “ Green Tar iffues out of the Earth from 
“ the Munjack Rocks , and is commonly gathered after a 
** Shower of Rain, by fkimming it off from the Surface of 
** Water: then putting it into a great Gourd, or fuch 
“ like Veffel, that has an Hole at the Bottom, they feparate 
“ the Oil from the Water, by fuffering the Water to Hide 
** gently out, but when the Oil appears, they cautioufly ftoj> 
“ and preferve it for feveral Ufes, as to burn in Lamps, &c. 
“ The Munjack is nothing elfe than a Confirmation or Coa- 
gulation of the Tar (we fpoke of) into a more folid 
“ Body ; which Munjack were it in a frigid, as it is in 
** the torrid Zone, would be abfolute Coal, fuch as we 
“ burn in England” 
C H A P, 
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