and^ot)UrttOttOf©[olattlttPi 47 

 name of Menjlruumperacutum (which 

 confifts mainly, and fometimes onely, 

 of Spirit of Nitre,feveral times drawn 

 from Butter of Antimony, ) I was 

 able, without a very violent fire, in 

 a few hours to elevate fo much crude 

 Gold, a$j in the neck of the Retort, 

 afforded me a confiderable Quantity 

 of Sublimate, which I have had red 

 as blood, and whofe confifting partly 

 of Gold manifeftly appeared by this, 

 that I was able with eafe to reduce 

 thatmetall out of it. 



In reckoning up the Inftruments of 

 Volatilization j we muft not quite 

 leave out the mention of the Air> 

 which I have often obferved to faci- 

 litate the elevation of fome bodies 

 even in clofe Veflels} wherein, though 

 to fill them too Full be judged by ma- 

 ny a Compendious pra&ife becaufe 

 the fteams have a lefs way to afcend, 

 yet Experience has feveral times in- 

 formed me, that, at leaft in fome ca- 

 fes, they take wrong meafures, and 

 that (to pafs by another Caufe of 

 their difappointment) a large propor- 

 tion 



