Analy/is of the Air. 2 9 1 
Thatilluftrious Philofophcr 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 — arc endewed with a great attradive 
force, in which force their adivity con- 
<< fills — By this attradive force they get 
about the particles of bodies, whether 
they be of a metallick or ftony nature, 
and adhere to them moft clofely on all 
fides, fo that they can fcarce be feparated 
from them, by diftillation or fublimation 5 
when they are attraded and gathered to- 
gethcr about the particles of bodies, they 
raife, disjoyn, and fhake them one from 
another, that is, they diflblve thofe bodies. 
By their attradive force alfo, by which 
they ru(l> towards the particles of bodies, 
“ they move the fluid, and excite heat, and 
they (hake afunder fome particles, fo much 
‘‘ as to turn them into air, and generate 
bubbles : And this is the reafon of diflb- 
lution, and all violent fermentation. Har- 
ris Lexicon Tech. Vol. II. introdudion.” 
Thus we have from thefe Experiments 
many manifeft proofs of confiderable quan- 
tities of true permanent ak, which are by 
U z means 
