$6 flDf t|>e ^ec&amcal fl)jf£tne 



not feldom found quantities of Tin 

 carried up to a notable height in the 

 form of a whitifh powder, which, 

 being in good cnaffes forced off from 

 the places to which it had faftened it 

 felf 5 does by a skillful redu&ion yield 

 many a pound weight of good mal- 

 leable metal, which teemed to me to 

 be rather more, than lefs, fine than 

 ordinary Tin. 



Poftfcript, 



Relating to Page 1 5 . of this Tratf > and 

 here annextfor their fa^es^ who have 

 a mind to repeat the Experiment there 

 delivered^ that fo they may know the 

 quantities employed in it. 



With two parts of this Crocus we 

 ground very well three parts of Sal 

 Armoniac, and having fublimed thetn in a 

 ftrong fire, we took off the high coloured 

 Sublimat >and put in either an equal weight, , 

 or a weight exceeding it by half,to theCaput 

 Mortuum, we found after the fecond Subli- 

 mation, which was alio high coloured, thai 

 of an ounce of Crocus we had raifed fix 

 drams, that is v three quarter* of the whole 

 weight. 



FINIS. 



