466 Dr. Wall on AttraElton and Repul/ton. 



metal in an acid, another metal which has ^ 

 ftronger attraction for that acid, we know that 

 the former metal will be precipitated, and the 

 latter taken up in its place : and the former will 

 be precipitated, not in a calcined, but in a me- 

 tallic ftatej becaufe, in this inftance, the precipi- 

 tated metal attradts the phlogifton, of which the 

 other metal is deprived by its folution. Tt 

 appears therefore that the whole bufinefs of the 

 calcination and reduction of metals depends 

 upon the lavvs of fingle or double eleftive attrac- 

 tion, either fimply in folution, or as they are 

 afFedted and varied by heat. It appears too, 

 how nearly thefe procefles are conneded with 

 the doftrine of the elaftic fluids, with which we 

 are fo lately made acquainted; for the properties 

 of fixed air are fully ellabliflied ; and I think, the 

 more recent experiments of Dr. Prieftley, &c. 

 go near to fhew, that the phlogifton of metals, 

 if not exadtly the fame, is certainly nearly the 

 fame, as inflammable air. 



On 



