The Vanishing Ring on String

This is a good effect with which to follow either of the above tricks. You use only the string.

Performer ties a single knot in the center of the piece of string, single knot forming a ring. He ties the two ends of the string together four or five times so as to make a rather long knot. Then he tells someone to try to take the ring off the string without untying the ends. After the spectator has failed, magician takes string in hands and asks spectator to take out his own handkerchief and cover performer's hands.

In a moment performer withdraws his hands and shows that ring has vanished from string.