Miniature Fire-ships.
Procure a good-sized lump of camphor. Cut it up into pieces of the size of a hazel-nut, and having a large dish filled with cold water in readiness, lay the pieces on the surface, where they will float. Then ignite each one of them with a match, and they will burn furiously, swimming about all the time that the burning is in progress, until at last nothing remains but a thin shell, too wet to be consumed.