42. I will now give a few formulas for common and sparkling fires, which
will in all probability be found very useful for jets and fixed pieces.
COMMON AND SPARKLING
FIRES.
No. 1.
Meal-powder 4 parts.
Charcoal No. 2 1 part.
Or,
No. 2.
Meal-powder 16 parts.
Nitre 8 „
Sulphur 4 „
Charcoal No. 2 4 „
Or,
No. 3.
Meal-powder 16 „
Very fine glass dust 5 „
Or,
No. 4.
Meal-powder 8 „
Very finely powdered porcelain 3 „
These four compositions will be found effective for many purposes, but
should not be used in cases under the _one-ounce size_. Their great
advantage is that they are not in the least degree impaired by keeping.
They are to be rammed into the cases in precisely the same manner as
directed for Chinese fire.