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come together for an instant, as if by accident; but this fleeting contact goes unnoticed, obscured by the flow of the larger motions.

The folded selection now hangs caught between the partially closed lid and the base of the box (Figure 10). This is the crucial job that the box has been constructed to perform. The little knob and the tapered shape of the lid arc carcfully designed to assure that the card is caught and held. (A flat-topped lid cannot be depended on to trap the card.)

As you hold the box roughly six inches above your open right hand, give it a litde shake, causing the folded selection to fall out (Figure 11). The illusion created is absolutely convincing. First the spectators clearly see a folded card inside the box; then they see it fall deanly

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