FIG. 2. Fix a wire in the lead, with which the bottom of the bottle
is armed (_d_) so as that bending upwards, its ring-end may be level
with the top or ring-end of the wire in the cork (_e_) and at three
or four inches distance. Then electrise the bottle, and place it on
wax. If a cork suspended by a silk thread (_f_) hang between these
two wires, it will play incessantly from one to the other, till the
bottle is no longer electrised; that is, it fetches and carries fire
from the top to the bottom[29] of the bottle, till the equilibrium is
restored.