324 ESSAYS AND OBSERVATIONS, 



(diiToIved in a weak vegetable acid, thaii 

 ip. a much ftrong.er one of the mineral 

 kind. Oleum vitrioli^ fphitus vitri, or aquc^ 

 fortis, the mod ponderous and corrofive 

 of the acid liquors, carinpt diffolve be^- 

 wax or crude fulphur, which will readily 

 relent in the mild and foft oil of olives } 

 jal tariariy or oleum tartari p. d. is almofc 

 equally covroilve, with regard to the hu- 

 man body, as aqua fot tis : Yet the folvent 

 powers of thefe liquors, with refpecfl to 

 other fubftances, are rnqfl: oppohte. 



III. Th'e .'fi'tnefs of a liquor to diiTolve 

 a certain body, cannot be certainly learn- 

 ed from the agreement of that body ill. 

 feveral properties with another which we 

 know can be diffolved in that liqviqr. 

 Neither can we fafely conclude, that two 

 liquor?, whi.. h nearly refemble one; aiio- 

 ther, will m.utually diilolve all the fame 

 bodies. 



We m-eet with abundance of inflanees 

 in chym.iflry, to make us cautious in 

 draT'.'ing fuch conclufions. Well rectified 

 fpirit of wine makes a very compleat 



folution 



