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Example Suppose The Person Wishes His Card To Be The Twentieth

from the top; and the first time of making the heaps, he says it is in

the third heap; you then look at the table in the perspective, and you

see that the first figure is two; you, therefore, put that heap in the

middle of the pack. The second and third times, you in like manner put

the heap in which he says it is, at bottom; the number each time being

three. Then looking at the pack with your glass, as if to discover

which the card was, you lay the cards down, one by one, and the

twentieth will be the card fixed on.