of&lettrtct'tp* 23 



Vitrum Antwoniij that is fa id to be 

 purer than ordinary •> may be made 

 of the Regains of the fame Mineral, 

 in whofe preparation you know a 

 great part of the Antimonial Sul- 

 phur is feparated and left among the 

 Scoria $ fo Glafs of Antimony made 

 Without additament, may eafily 5 as 

 experience has informed us § be in 

 part reduc'd to a Regains, ( a Body 

 not reckoned amongft Eleftrical 

 ones* ) And that you may not think, 

 that 'ti$ ooely fome peculiar and fixt 

 part of the Antimony that is capable 

 Of Vitrification , let me afTure you 5 

 that even with the other part that is 

 wont to flye away 5 (namely the 

 Flowers ) an Antimonial Glafs may 

 without an addition of other Ingre- 

 dients be made/ 



EXPER. IV. 



FOurthly The mention of a Vi- 

 trified Body brings into my 

 mind, that I more than once made 

 fome Glafs of Lead per fe , (which 



I 



