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The Appearing Knot Take a handkerchief and hold it by one corner. Shake it two or three times and suddenly a knot appears in the hanging corner of the handkerchief. Here is how it is done: Stan with a handkerchief with one corner tied in a knot. Hold it as shown in figure 1> with comer A hanging down. The comer with a knot in it (corner B) is concealed in the right hand. Lift up corner A with the left hand, so that both comers are held in the right hand. Give the handkerchief a quick shake and let corner A fall again. Repeat this two or three times, and act disappointed when no knot appears. The last time you take up corner A, so that you have both corners in the right hand (fig. 2), hold on to corner
A when you shake the handkerchief. and let corner B fall instead. In other words, exchange the corners (fig. 3). Those watching the trick think it is the same corner all the time.