[ 476 ] 
will not bum, nor even Gunpowder fire, in the artificial 
Vacuum . It being therefore granted, that there are 
the Elements of Fire and of Air lying dormant in all 
Bodies; there is only required fucli an Attion as 
may fet at Liberty the Particles of Air, and the Par- 
ticles of Fire ; by which Adtion the Particles of Air 
will recover their Elasticity, and, putting the Parti- 
cles of Fire in Motion, caufe Heat or Warmth, but not 
Incenfion orlnflagration ; unlefs the Fire thus agitated 
meets with a proper Pabulum , which Pabulum is 
Sulphur only, tho’ differently modified, whether un- 
der the Appearance of Brimfione, Bitumen , Oil, vi- 
nous Spirits, vegetable Subftances when deprived of 
their Water, metalline Sulphurs, or the mod inflam- 
mable of all, animal Sulphur, commonly called by 
our modern Chemifts Phofphorus. 
Thus in Fermentation, the Fire and Air being let 
loofe, produce a Warmth, but do not kindle, becaufeof 
theW ater predominating ; whereas in the EfFervefcence 
produced by the Solution of Metals, the Fire meets 
with the metalline Sulphur, which it kindles, and 
fometimes caufes Explofions ; the aromatic Oils con- 
taining but little Water, being almoft entirely com- 
pofed of the fulphureous Parts of the Vegetables, 
immediately kindle, and break out into Flame ,• and 
Phofphorus , which is nothing but the animal Sul- 
phur, as appears by the curious Account of it given 
us by that late ingenious Chemift Mr. Godfry , a 
worthy Member of this Society, {fee Tranf. N°.42 8„ 
p. 69. 70. is fo greatly difpofed to take Fire, that if 
it be only expofed a few Minutes to the open Air, 
it kindles and flames. 
3 
Now 
