6 imperfection of tfce €tymi$& 



veftigating what Ingredients mixt bo- 

 dies are made up of fince in divers 

 cafes That may be difcovered by 

 Compofition as well as by Refpluti- 

 on 5 as it may appear,that Vitriol con- 

 lifts of metalline parts (whether Mar- 

 tial, or Venereal^ or both) *a{Tocia- 

 ted by Coagulation with acid ones, 

 one may, I fay, difcover this as well 

 by making true Vitriol with Spirit 

 (improperly called Oil) of Sulphur, 

 or that of Salt^ as by diftilling or Re- 

 folving Vitriol by the fire. 



But I will not here enlarge on this 

 fubjeft., nor yet will I trouble you 

 with what I have largely difcourfed in 

 the Sceptical Chymift^ to call in que* 

 ftion the grounds on which Chymifts 

 aflert, that all mixt bodies are com- 

 pounded of Salt , Sulphur, and Mer- 

 cury. For it may fuffice me now to 

 tell you 5 that, whatfoever they may 

 be able to obtain from other bodies, 

 it does not appear by Experience^ 

 which is the grand, if not the onely. 

 Argument they rely on, that all mixt 

 bodies that have Qualities^ confift of 



their 



