i* Kefltftfonfftqum ttyfymtW* 



And among Acidt themfelves the 

 difference is no lefs if not much 

 greater. Some of them will diffolve 

 bodies that others will not, as Aqua, 

 fortis will diflblve Silver and Mercu- 

 ry, but leave Gold untouched 5 or as 

 AquA Keg*\r,though made without Sal 

 Armmiac that ckflblves Gold readily, 

 will diflblve Mercury but* fcurvily, 

 and Silver not at all. And this may 

 happen,when the Afettjiruum that will 

 not diflblve the body is reputed much 

 ftronger than that which docs 5 as 

 dephlegmd fpirit of Vinegar will 

 diffolve Lead^reduc'd to minute parts 

 in the cold 5 which is an cffeft that 

 Chymifts are not wont to expeft 

 from Spirit of Salt. Nay, which is 

 more^ one Acid will precipitate what 

 another has;diffolved,andcontrarily$ 

 as fpirit of Salt will precipitate Silver 

 out of fpirit of Nitre. And I found 

 oil of Vitriol to precipitate bodies of 

 divers kinds^Vlinerals and others* out 

 of forae acid Menftruums^particularly 

 fpirit of Vinegar. 



To 



