EXPERIMENT III.
THE Transparent Glass made of Antimony burnt to Ashes, had a considerable Degree of Electricity. Which is the more worthy our Notice, because, that as a Vitrum Antimonii, which is accounted purer than ordinary, may be made of the Regulus of the same Mineral, (in whose preparation a great deal of Sulphur is separated and left amongst the Scoriae) so Glass of Antimony made without Addition, may in part be reduc'd to a Regulus (a substance not looked upon to be Electrical:) Nor is some peculiar and fixed part of Antimony alone capable of Vitrification, since of the other Part, which usually flies away, an Antimonial Glass may be made, without an Addition of other Ingre∣dients.