Making an Electroscope

Strip the sheathed copper wire on 12 cm.
Bend at right angle and roll up in a spiral.
Cut the straigth section according to the
height of your jar. Unsheathe 3 mm.

Make a hole in the center of the lid.
Glue it on the two sides of the lid. côté.

Wrap the small bare wire on the other end
finishing by a circular hook.

Fold an alumunium foil on a thick paper. Cut out in
the form of a trapezium (trapezoid), nearly triangular.

Cut out once again in the form of a pear and pierce.

Hang up.

Your electroscope is finished.