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Rh Vitrum Antimonii, that is aid to be purer than ordinary, may be made of the Regulus of the ame Mineral, in whoe preparation you know a great part of the Antimonial Sulphur is eparated and left among the Scori&aelig;; o Glas of Antimony made without additament, may eaily, as experience has inform'd us, be in part reduc'd to a Regulus, (a Body not reckon'd amongt Electrical ones.) And that you may not think, that 'tis onely ome peculiar and fixt part of the Antimony that is capable of Vitrification, let me aure you, that even with the other part that is wont to flye away, (namely the Flowers) an Antimonial Glas may without an addition of other Ingredients be made.

Ourthly, The mention of a Vitrified Body brings into my mind, that I more than once made ome Glas of Lead per e, (which I