of an Inch Diameter, and the Rammer somewhat less, that it may easily
pass and re-pass, made hollow to receive the Broach; for the Cartoush
Coffin must be filled with the Materials, the Broach being in.

If the Bore be two Inches Diameter, the Rocket must be twelve Inches in
Length: If an inch and a half in Bore, then nine Inches Long, and so
proportionably to any other Diameter. The Cartoush or Case must be
either strong Paper or fine Paste-board, choaked within an Inch and a
quarter of the Top, rowled on the Rowler with a thin Paste, to keep the
Doublings the higher together, that it may have the greater force and
higher flight. Having thus far considered your Mould and Cartoush or
Case, I proceed to the Composition and filling part, &c.


_A_ Sky-Rocket, _how to make it_, &c.

In the Composition of your filling Materials be very cautious that you
exceed not the just Proportion, for which I shall give Directions to be
a Standard in this case, _viz._ Having beat a Pound of Powder very fine,
and sifted it through a Lawn Sieve that no whole Corns remain in it; do
the like by two Ounces of Charcole; then sift them together, so that
they may mix well, which done, fill a small Rocket with this Mixture,
and if it break in Mounting before it come to the supposed height, or
burns out too fierce, then is there too much Powder, and more fine
sifted Charcole must be added; but if there be too much Charcole in the
Composition, then upon tryal it will not ascend, or very little.

Observe in charging your Rocket, at every quarter of an ounce of
Ingredients or thereabouts, you ram it down very hard, forcing your
Rammer with a wooden Mallet, or some weighty piece of Wood, but no Iron