This trick, which is very easy, always produces a great effect.
It only requires a little attention, and it can never fail unless
you make a mistake in arranging the cards, which, however, is too
simple to admit of error.
9. Two persons having each drawn a card from a pack, and having
replaced them, to tell these cards after the pack has been
shuffled and cut by the spectators as often as they like.
The cards may be easily divided into two numerical parts, even
and odd: by taking a king for four points, a queen for three, a
knave for two, and the other cards for their especial points, we
may make up two sets of sixteen cards each, the even composing
one, and the odd the other. These two sets being before the
performer, he takes one, shuffles it well, and lets a party take
a card. He then takes the other, shuffles it, and lets another
party take a card. Then, whilst each party is looking at his
card, which HE IS REQUESTED TO DO, the performer dexterously
changes the place of the two sets, and he requests the parties to
replace the cards in the set whence they took them. It follows
that the party who took a card from the EVEN set places it in the
ODD set, and he who took it from the ODD set places it in the
even set.
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