and mathematician, in 1733 stated like of
paper fragments, after to have he touches them to you with electrified
glass, come attracted from the amber and those rejected from the amber
come attracted from the glass.
expresses for first, even if with other terminology, the concept of
positive and negative electricity, that he calls "vi treas"
and "resinosa", advancing therefore the so-called "dualistic
theory". theory that, will be supported also from Nollet
Abbot, one of greater electro logy the Europeans of the time.
From the studies of Du Fay various applications,
between which new it blots some electrostatic that, by means of
soffregati discs of glass from bearings are born, are in a position to
distributing electricity in sufficient amount in order to produce
sparkles with which they come ignited several substances.