I think alfo it may be doubted y 

 whether thofe, I reafon with, are fo 

 certain as they fuppofe, that at leaft 

 when they can manifeftly difcover an 

 Acid 5 for inftance 5 in a body, the 

 operation of that body upon another, 

 which they judge to abound with an 

 Alcaic muft be the effeft of a Con- 

 fiid between thofe two jarring Prin* 

 ciples, or 5 if I may fo call them 5 Duel- 

 lifts. For an Acid body may do ma- 

 ny things^not (imply as an acid^but on 

 the fcore of a Texture or modificati- 

 on 5 which endows it with other Qua- 

 lities as well as Acidity., whofe being 

 afibciated with thofe other Qualities 

 in fome cafes may be but accidental 

 to the effeft to be produced} fince by 

 one or more of thefe other Qualities 

 the body may aft in cafes,where Pre- 

 judice may make a Chymift confider 

 nothingjbut Acidity. Thus when 

 fome Chymifts fee an zcidMenjlruum y 

 as jiquafortis^p\r\t of Salt, oil of Vi- 

 triol, 8tc. diflblve Iron* they prefent- 

 lyafcribethe effeft to an Acidity of 

 the HquorSjWhereas well dephlegmed 



A 4 Uri- 



