ls on the ocean,
observing to let that end where the storm is, appear in a state of
violent commotion, and the vessels as if raised on the waves in an
unsettled position, with heavy clouds about them.

You then pass the glasses slowly through the groove, and when you come
to that part where the storm is supposed to begin, move them gently up
and down, which will give the appearance of the sea and vessels being
agitated; increase the motion till they come to the height of the
storm. You will thus have a very natural representation of the sea and
ships in a calm and storm; and as you gradually draw the glasses back,
the tempest will subside, the sky appear clear, and the vessels glide
gently over the waves.

By the means of two or three glasses, you may also represent a battle
on land, or a naval engagement, with a variety of other pleasing
experiments.

_To produce the appearance of a Spectre on a Pedestal in the middle of
a Table._

Enclose a small magic lantern in a box, Fig. 11, large enough to
contain a small swing dressing-glass, which will reflect the light
thrown on it by the lantern in such a way, that it will pass out at
the aperture made at the top of the box; which aperture should be
oval, and of a size adapted to the cone of light to pass through it.
There should be a flap with hinges, to cover the opening, that the
inside of the box may not be seen.

[Illustration: Fig. 11.]

There must be holes in that part of the box which is over the lantern,
to let the smoke out; and over this must be placed a chafing-dish of
an oblong figure, large enough to hold several lighted coals. This
chafing-dish, for the better carrying on the deception, may be
enclosed in a painted tin box, about a foot high, with a hole at top,
and should stand on four feet, to let the smoke from the lantern
escape.

There must also be a glass planned to rise up and down in the groove
_a b_, and so managed by a cord and pulley, _c d e f_, that it may be
raised up and let down by the cord coming through the outside of the
box. On this glass, the spectre, (or any other figure you please,)
must be painted in a contracted or equal form, as the figure will
reflect a greater length than it is drawn.

When you have lighted the lamp in the lantern, and placed the mirror
in a proper direction, put the box on a table, and, setting the
chafing-dish in it, throw some incense, in powder, on the coals. You
then open the trap door and let down