Are magnetism and electricity much alike?
Yes; they are so nearly alike that many persons think they are identical.
What is an electro-magnet?
An electro-magnet is a magnet obtained by means of electricity.
Of what is the magnet made?
The magnet is made of soft iron, around which are wound a great many coils of wire, and these are covered with silk.
How is the soft iron made into a magnet?
The iron is magnetized by the passage of electricity through the wire.
Of what use is this magnet?
It is used in the electro-magnetic telegraph.