Cool a spoonful of hot water just one degree, and the energy set free by the cooling will operate a telephone for ten thousand years.

Catch the falling tear-drop of a child, and there will be sufficient water-power to carry a spoken message from one city to another.
Such is the tiny Genie of the Wire that had to be protected and trained into obedience.

It was the most defenceless of all electric sprites, and it had so many enemies.

Enemies! The world was populous with its enemies.

There was the lightning, its elder brother, striking at it with murderous blows.