THE OBEDIENT BROWNIE.
Hang a penny between the poles of an electro-magnet, and spin it round. On making the connection with the battery, the coin will be stopped short, and will place itself in the equatorial position.
Hang a penny between the poles of an electro-magnet, and spin it round. On making the connection with the battery, the coin will be stopped short, and will place itself in the equatorial position.