they
are all rammed alike, and well made. They are sometimes called
chained rockets.

_To fix several Rockets to the same Stick._--Two, three, or six
sky-rockets, fixed on one stick, and fired together, make a grand and
beautiful appearance; for the tails of all will seem but as one of an
immense size, and the breaking of so many heads at once will resemble
the bursting of an air-balloon. The management of this device requires
a skilful hand; but if the following instructions be well observed,
even by those who have not made a great progress in this art, there
will be no doubt of the rockets having the desired effect.

Rockets for this purpose must be made with the greatest exactness, all
rammed by the same hand, in the same mould, and filled with the same
proportion of composition: and after they are filled and headed, must
all be of the same weight. The stick must also be well made (and
proportioned) to the following directions; first, supposing the
rockets to be half-pounders, whose sticks are six feet six inches
long, then if two, three, or six of these are to be fixed on one
stick, let the length of it be nine feet nine inches; then cut the top
of it into as many sides as there are rockets, and let the length of
each side be equal to the length of one of the rockets without its
head; and in each side cut a groove (as usual;) then from the grooves
plane it round, down to the bottom, where its thickness must be equal
to half the top of the round part. As their thickness cannot be
exactly ascertained, we shall give a rule, which generally answers for
any number of rockets above two; the rule is this: that the stick at
top must be thick enough, when the grooves are cut, for all the
rockets to lie, without pressing each other, though as near as
possible.

When only two rockets are to be fixed on one stick, let the length of
the stick be the last given proportion, but shaped after the common
method, and the breadth and thickness double the usual dimensions. The
point of poise must be in the usual place (let the number of rockets
be what it will;) if sticks made by the above directions should be too
heavy, plane them thinner; and if too light, make them thicker; but
always make them of the same length.

When more than two rockets are tied on one stick, there will be some
danger of their flying up without the stick, unless the following
precaution is taken: For cases being placed on all sides, there can be
no notches