At nine, Poncelet bought a watch that was out of order in order to study it, then took it apart and put it together correctly.
You know what Poncelet understood by the principle of continuity.
The efficiency of a Poncelet wheel has been found in experiments to reach 0.68.
Several constructions have been given for the floats of Poncelet wheels.
A general notion of the action of the water on a Poncelet wheel has already been given in 159.
