The glass bar is used in order to insulate a curved bronze conductor with a spherical end. Functioning: The glass insulator allows for collection and transport of electrical charges in order to use them in electrostatic experiments. DataInventory Number: ELE22Date: 1850-1870Dimensions: Length: 41cmInstrument Categories: ElectricityDemonstration apparatus PlacesLocation: 1ο Γυμνάσιο Βόλου - First Gymnasium of VolosOrigin: 1ο Γυμνάσιο Βόλου - First Gymnasium of Volos