HYDRAULIC DANCER.
Make a little figure out of a piece of cork, pith, or some equally light material; place in the figure a small hollow cone of thin leaf brass; then set the figure on any water-jet or small fountain, and it will remain suspended on the top of the water, and will jump, dance, and move about in a very amusing manner. A hollow ball of thin copper, placed on a jet or fountain in a similar way, will remain suspended, turning round and spreading the water gracefully about it.