He plays like a magician with the earth's magnetism.

He sees the invisible lines along which its magnetic action is exerted, and sweeping his wand across these lines evokes this new power.

Placing a simple loop of wire round a magnetic needle he bends its upper portion to the west: the north pole of the needle immediately swerves to the east: he bends his loop to the east, and the north pole moves to the west.

Suspending a common bar magnet in a vertical position, he causes it to spin round its own axis.

Its pole being connected with one end of a galvanometer wire, and its equator with the other end, electricity rushes round the galvanometer from the rotating magnet.