Analyfis of the Air. 19$ 
That illuftrious Philofopher Sir Ifaac New- 
tony in his thoughts about the nature of a- 
cids, gives this rational account of the na- 
ture of fermentation. “ The particles of 
“ acids— -are endued with a great attractive 
<c force, in which force their activity con- 
<€ lifts — By this attractive force they get 
“ about the particles of bodies, whether 
“ they be of a metallick or ftony nature, 
<e and adhere to them molt clofely on all 
u fides, fo that they can fcarce be feparated 
u from them by diftillation or fubIimation 5 
u when they are attra&ed and gathered to- 
u gether about the particles of bodies, they 
6< raife, disjoin, and fhake them one from 
l € another, that is, they diffolve thofe bodies. 
“ By their attractive force alfo, by which 
gc they rufh towards the particles of bodies, 
* c they move the fluid, and excite heat, and 
“ they fhake afunder fome particles, fo much 
“ as to turn them into air, and generate 
“ bubbles: And this is the reafon of diflo- 
€t lution, and all violent fermentation. Har- 
u ris LexiconTech.VoLIh introduction/* 
Thus we have from thefe Experiments 
many manifeft proofs of confiderable quan- 
tities of true permanent air, which are by 
pieans of fire and fermentation raifed from, 
U 1 and 
