The magician holds the cord vertically and demonstrates that the ball slides down freely. Yet, when desired, the magician can stop the ball at any point on its descent. When spectators try to duplicate this, the ball refuses to stop anywhere other than when it reaches the bottom of the cord. The manufacturer of this ball is not known, but the secret that allows it to work is cleverly hidden.
The Davenport Collection
- a growing resource on magic and entertainment history