PHYSICALsanno LITERARY. 289 
II. Tas, fitnefs of arliquor to diffolve a 
_ cérfain body,,cannot be certainly learned from 
ithe agreement of that body in feveral_pro- 
perties with, another, which we know can 
be diffolved in that liquor, Neither can 
we fafely conclude, that two liquors, which 
nearly refemble> one another, will mutually 
diffolve all the fame bodies. | 7 
-« We meet with abundance of inftances in 
chemiftry, to make us cautious indrawing fuch 
‘conclufions. ©. Well rectified (pirit of wine, 
makes a very compleat folution of colophony 
_or any of the common rofins ; bat there are 
feveral fabftances which have a great affinity 
to rofins,.\ as, /acca, \copal, amber, . fulpbur, 
which being digefted with highly redified 
fpirit of wine, will fcarce give a tindure to 
ithe fpirit; that is, thefe bodies remain either 
“altogether, or, for the far greater part, indiffo- 
uble:in'that hquor, unlefs they are previouf- 
sly prepared and difpofed to a folution, by the 
‘interpofition of another body, as a fixt alca- 
line falt, 8c.» Deftilled vinegar will readily 
}diffolve copper, lead; iron; but, it would 
be rath to'conclude, that the fame liquor 
will alfo diffolve gold, filver, antimony, what- 
ever agreement we find between thefe bodies 
ve Oo and 
