| Show IllUSION WITH SPINNING PIN With Little Practice One May Successfully Sue Sue- Imitate Very Many Objects Take a piece of rubber or elastic and nd run a pin through It as the figure shows Twirling the ends of the elastic vertically between your thumbs and forefingers and separating separating ing ng the hands In order to tighten it you give the object a sufficiently swift rotation to enable It to produce the image mage of a drinking goblet says Mag Mag- lea ica ca Experiments The illusion is the |