$6 ©f t&e ®ecl>antcal ^tgtne of 



der into fome Aquafortis, or Spirit of 

 Nitre, there infued a fpeedy Diflb- 

 Jutioa even in the cold. 



And that this Difpofition to be 

 diffolved by Spirit of Salt, that 

 Mercury acquires by beiog turned in- 

 to Precipitate per fe, that is, by being 

 calcind, is not meerly the effeft of 

 the operation of the fire upon it^ but 

 of foroe change of Texture pro- 

 duced by that Operation } may be 

 probably argued from hence , that, 

 whereas Spirit of Salt is a very pro- 

 per Menfiruum^ as I have often tri- 

 ed , for the diflblving of Iron or 

 Steel 5 yet, when that Metal is re- 

 duced by the a&ion of the fire ( e- 

 fpecially if a kind of Vitrification, 

 and an irroration with diftilFd Vi- 

 negar have preceded ) to Crocus 

 Mtrtis , though it be thereby 

 brought to a very fine powder , yet 

 I found not , that, as Spirit of Salt 

 will readily and with heat and nolle 

 diflblve Filings of Mars, (6 it would 

 have the fame or any thing near 

 fuch an Operation upon the Crocus : 



but 



