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Evening Star, Issue 18160, 28 December 1922, Page 8

Here is a little trick that anyone can master. The next time you have chicken for dinner save the wishbone, and wind some strong thread several times about the extremities of it, passing it around both two passes of thread thus formed and turn it in a circle several times, until the thread is very light and the ends of the wishbone are drawn closely together. Then suddenly let the match go, and it will describe a complete circle, producing the most curious optical illusion. The rotary motion of the match is so quick that no eye can follow it, and it seems as if the free end actually cleft the wishbone in passing from one side to the other. No matter how often the trick is done, nor how closely the audience are watching, the illusion will refhain.