Or the following is quicker in combustion:—

No. 2.

Meal-powder 16 „

Sulphur 3 „

Charcoal 3 „

Iron borings 7 „

Or,

No. 3.

Meal-powder 8 „

Nitre 16 „

Sulphur 3 „

Charcoal 3 „

Iron borings 8 „

Or,

No 4.

Meal-powder 16 „

Nitre 8 „

Sulphur 4 „

Charcoal 3 „

Iron borings 7 „

The compositions given above produce what is termed _Red Chinese Fire_,

since they all contain charcoal. I have numbered the charcoal, because

Mr. Bolton, 146, Holborn-bars, supplies three different degrees of

fineness, the _second_ of which is proper for this purpose.

Pyrotechny · 第 59 / 97 题