prevent the silver from escaping. When you wish to explode one put
it on the ground, and tread hard upon it, and it will go off with a
loud noise. These balls may be made productive of much amusement in
company, by placing a chair lightly on them; for whoever sits down
upon them will cause them to explode. These globes may be procured at
the barometer-makers.

THE DETONATING TAPE.

Is made of binding, about three-eighths of an inch in width. Observe
the same directions as given for the girdle; you may either explode it
yourself, by taking hold of each end, and rolling the ends from each
other sharply, or give one end to another, and pull together.

DETONATING CARDS.

Take a piece of card about three-fourths of an inch in breadth and 12
in length; slit it at one end, and place in the opening a quarter of a
grain of fulminating silver; close the edges down with a little paste,
and when dry you may use it by lighting the end in a candle.

Having given the method by which these loud reports are produced, we
shall mention some other effects to be produced by the silver, capable
of affording much amusement. For instance, by placing about a quarter
of a grain of the silver in the midst of some tobacco in a pipe, or
between the leaves of a cigar, and closing the end again, to prevent
the powder from falling out; when lighted, it causes a loud explosion;
for heat, as well as friction, will equally do.

Or, take one-third of the grain of fulminating silver; fold it up in a
small piece of paper, and wrap it up in another piece, and paste it
round a pin. These pins stuck in the wick of a candle make a very loud
noise.

Fulminating silver may be also used in the following manner:--Put half
a grain in a piece of glass-paper, and enclose it in a piece of foil;
put it then at the bottom or side of a drawer, and on opening or
shutting it, it will immediately go off.

Put a quarter of a grain of fulminating silver into a piece of paper,
and place in the snuffers when quite cold; when the candle is snuffed,
it will go off.

AQUATIC FIRE-WORKS.

Works that sport in the water are much esteemed by most admirers of
fire-works, particularly water-rockets; and as they seem of a very
extraordinary nature to those who are unacquainted with this art, they
merit a particular explanation.

_Water-Rockets._

They may be made from four ounces to two pounds. If larger, they are
too heavy; so that it will be difficult to make th