Incendiary-match.—Is made by boiling slow-match in a saturated solution of nitre, drying it, cutting it into pieces, and plunging it into melted fire-stone. It is principally used in loaded shells.
Hot Shot.—See [Hot Shot].
Fireworks for Light.—The preparations for producing light are [fire-balls], [light-balls], [tarred-links], [pitched-fascines], and [torches].
Fire-ball.—A fire-ball is an oval-shaped canvas sack filled with combustible composition. It is intended to be thrown from a mortar to light up the works of an enemy, and is loaded with a shell to prevent it from being approached and extinguished. The composition for a fire-ball consists of nitre 8 parts, sulphur 2 parts, antimony 1 part. The bottom of the sack is protected from the force of the charge by an iron cup called a culob, and the whole is covered and strengthened with a net-work of spun-yarn or wire, and then overlaid with a composition of pitch, rosin, etc.
Light-ball.—These are made in the same manner as fire-balls, the shell being omitted.
Tarred-links.—Tarred links are used for lighting up a rampart, defile, etc., or for incendiary purposes. They consist of coils of soft rope placed on top of each other, and loosely tied together; they are immersed in a composition of 20 parts of pitch, and one of tallow; when dry, they are plunged into a composition of equal parts of pitch and rosin, and rolled in tow or sawdust.
Pitched-fascines.—Fagots of vine twigs or other very combustible wood, about 20 inches long and 4 inches in diameter, tied in three places with iron wire. They may be treated in the same manner and used for the same purposes as tarred-links.
Torches.—A torch is a ball of rope impregnated with an inflammable composition, and is fastened to the end of a stick, which is carried in the hand.
Offensive and Defensive Fireworks.—The principal preparations of this class, employed in modern warfare, are [bags of powder] and [light-barrels].
[Bags of Powder].—Bags or cases of powder may be used to blow down gates, stockades, or form breaches in thin walls. The petard was formerly employed for these purposes, but it is now generally thrown aside. The effect of the explosion may be much increased by making three sides of the bag of leather, and the fourth of canvas, which should rest against the object.