Sense of Touch is a versatile principle, rather than one particular effect. Toillustrate its potential, I will first of all describe a ‘test conditions’ routine which Ihave performed for many years, called the SWIFT Challenge (‘SWIFT’ = SeeingWith Finger Tips).The performer offers to demonstrate ‘seeing’ with his fingertips, and gives a packof cards to a spectator. While the performer looks away, the spectator chooses ahandful of red and black cards and mixes them. The performer takes back this facedown packet of cards. By lightly feeling the face of each card with his fingertips, heis able to tell whether it is red or black.
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