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glass was charged with vitreous electricity, and, when amber was rubbed with fur, the amber was charged with resinous electricity. Another important two-fluid
electricity, either vitreous or resinous electricity. He found that an object with vitreous electricity would repel another vitreous object, but would be
Jardin du Roi. He discovered the existence of two types of electricity and named them "vitreous" and "resinous" (later known as positive and negative charge
with lead foil. In the same, year he proposed that the two types of electricity—vitreous and resinous—posited by DuFay were actually a surplus (a positive
electricity. In addition to the china produced for distribution as premiums to Larkin customers, Buffalo Pottery produced many lines of semi-vitreous