rubbing.

If the paper thus painted, as it were, with sealing-wax be gently
warmed by holding the back of it to the fire, the wax will adhere to
it, and the result of the experiment will thus be rendered permanent.

_The Electrified Camphor._

A beautiful experiment of the same nature is made with camphor. A
spoon holding a piece of lighted camphor is made to communicate with
an electrified body, as the prime conductor of a machine; while the
conductor continues electrified by keeping the machine in motion, the
camphor will throw out ramifications, and appear to shoot like a
vegetable.

AMUSEMENTS WITH CARDS.

Many of the following recreations are performed by arithmetical
calculations, and may therefore be considered as connected with
science; but as it has been the aim of this work to unite amusement
with instruction, some experiments on this subject are introduced, the
performance of which depends on dexterity of hand. As this is only to
be acquired by practice, and, after all, is merely a mechanical
operation, the study of it will produce little useful knowledge,
though it may afford much entertainment; but as it must be gratifying
to know the method by which they are performed by those persons
skilled in such manoeuvres, who publicly exhibit them to the
astonishment of the spectator, they are presented to our readers, that
when they recognize them at any of these exhibitions, their eyes may
not be in danger of deceiving their judgment.

_To tell the Number of Points on Three Cards, placed under Three
different Parcels of Cards._

You first premise that the ace counts for eleven; the court cards ten
each; and the others according to the number of their pips. You then
propose to any person in company to choose three cards, and to place
over each as many as will make the number of the points of that card,
fifteen; take the remaining cards, and, under the appearance of
looking for a particular card, count how many there are, and by adding
sixteen to that number, you will have the amount of the pips on the
three cards. For example:

Suppose a person choose a seven, a ten, and an ace; then over the
seven he must place eight cards; over the ten, five cards; and over
the ace, four cards. In this instance there will remain twelve cards;
to which if you add sixteen it will make twenty-eight, which is the
amount of the pips on the three cards.

_The Ten Duplicates._

Select any twenty cards; let a