The Hydraulic Dancer
Procure a little figure made of cork, which you may dress as your
fancy dictates. In this figure place a small hollow cone made of thin
leaf brass.
When the figure is placed on a jet d'eau, that plays in a
perpendicular direction, it will be suspended on the top of the water,
and perform a great variety of amusing motions.
If a hollow ball of very thin copper, of an inch diameter, be placed
on a similar jet, it will remain suspended, turning round, and
spreading the water all about it.