PHYSICAL ann LITERARY. 287 
that any one liquor can be endued with 
powers correfponding to all the various cir- 
cum({lances of fuch a variety of bodies, fo as 
indifcriminately to diffolve all: it is therefore 
much more agreeable to the nature of things, 
that there fhould be a variety of liquors en- 
dued with different qualities, in different de- 
grees, to feparate the particles of fo many 
different folid bodies; and daily experience 
fufficiently confirms the truth of this conclu- 
fion. ‘There is perhaps no body, natural or 
artificial, but there may be found a men/fraum 
proper to diffolve it : and, tho’ fome liquors 
are known to diffolve feveral bodies which 
_ differ in many refpects; yet even thefe fol- 
vents, which are allowed to be moft exten- 
| five, are found incapable of diffolving a great 
_ many other bodies. 
I]. Tue denfity, folidity, hardnefs, fix- 
ednefs and other manifeft qualities of bodies, - 
can afford us no certain mark or indication of 
the qualities of the liquors, requifite to dif 
_ folve them, if experience is wanting. Nei- 
* ther can we conclude, from the ftrength, 
~ fharpnefs or “corrofivenefs of liquors, difco- 
_ vered by their effeG&s on the human body, 
the 
