of Alcali antj ActDum* 29 



CHAP.VIL 



TO clear up and to countenance 

 what I have been now faying, 

 I thai! only take notice of fome few 

 obviqus Phenomena of one of the 

 moft familiar Operations wherein 

 Acidum and Alcali are fuppofed to 

 be the grand Agents. Tis known 

 to the very Boys of Chymifts, that 

 Aqua Regis will diffolve Gold, Cop- 

 per, and Mercury,and that withthefe 

 metals, efpecially with the fecond, 

 it will produce an intenfe degree of 

 heat. If now the Caufe of this 

 Heat be demanded, it may be ex- 

 pe&ed, that the Patrons of the Du- 

 ellifts will anfwer, that 'tis from the 

 a&ion of the Acid falts of the Men- 

 ftruum upon the Alcali they meet 

 with in the Metalls. But not to 

 mention how many things are here 

 prefumed, not proved | nor that I 

 know fome Acid Menftruums, and 



fome 



