or Jt^oDuctton of f fttnefo 3 1 



there be no material additament left 

 with the Quick-filver, the Fixation 

 cannot fo reafonably be afcribed to 

 any things tofome new Mechanical 

 modification , and particularly to 

 fome change of Texture introduced 

 into the Mercury it felf. 



And that you may thiok this the 

 Ms improbable, I will now proceed 

 to fome Inftances, whereof the firft 

 (hall be this 5 That, having put a mix- 

 ture made of a certain proportion of 

 two dry, as well as volatile, bodies, 

 (viz. Sal Armoniae, and Flower or 

 very fine powder of Sulphur,) to half 

 its weight of common running Mer- 

 cury, and elevated this mixture three 

 or four times from it, (in a conveni- 

 ently fhaped,and not over-wide,glafs) 

 the Mercury, that lay in the bottom 

 in the form of a ponderous andfome- 

 what purplilh powder, was, by this 

 operation,fo fixt, that it long endured 

 a ftrong fire, which at length was 

 made fo ftrong, that it melted the 

 Glafs, and kept it melted, without 

 being ftrong enough to force up the 



Mer- 



