its falling off. In order to make sure
that no air can get into the glass, it is wise to smear the rim with
tallow before laying the cardboard on.

* * * * *

THE REVOLVING PINS

Take a piece of elastic which is not covered with silk or wool, and
through the middle of this stick a pin, which you have bent as shown
in the illustration.

Now hold the elastic between the thumb and first finger of each hand
and twirl it round, stretching it a little at the same time. The rapid
movement thus caused will make the revolving pin look like a glass
object, and if you have a strong light falling on the pin and a dark
background behind it, the resemblance becomes very much stronger.

After a little practice you will be able to represent many things in
this way--cheese dishes, vases, champagne glasses, etc.; and if the
bent pin should fall into a horizontal position while revolving, on
account of its shape, you can tie one end to the elastic with a piece
of white thread, which will not in any way interfere with the working.

This trick looks well in a darkened room, when the pin is illuminated
by a ray of sunlight coming through a hole in the window shutter.

* * * * *

THE MYSTERIOUS BALL

This seems to be a plain wooden ball with a hole bored in its center,
through which a string is passed. The ball will move lightly up and
down this cord, but let some one who knows the trick take the string
in his hand and it becomes quite a different matter; the ball will
move quickly, or slowly, at command, and, if told to do so, will stand
still until ordered to move on again.

The reason for this peculiar behavior is that inside the ball there
are two holes, one of which is quite straight, while the other is
curved, and turns out of the straight hole.

It is through this curved passage that the cord is passed, and you
can easily see that to regulate the movements of the ball, it is only
necessary to hold the string more or less tightly. If you hold the
cord perfectly tight, the ball will not be able to move at all. The
ball can be purchased at any top shop.

* * * * *

THE MAN WITH HIS HEAD THE WRONG WAY

Put on a coat and vest so that they fasten behind. Then fix a mask
over the back of the head and a wig over the face. The effect is very
curious.

* * * * *

TO FIND AN OBJECT WHILE BLINDFOLDED

T