Light balls are the same as fire balls, except that there is no shell in them, as they are used for lighting up our own works.
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15. What is a smoke ball?
A hollow paper sphere similar to a light ball, and filled with a composition which emits a dense, nauseous smoke; it is employed to suffocate the enemy’s miners when at work, or to conceal one’s own operations; it burns from twenty-five to thirty minutes.
16. In field pieces to what is the projectile attached?
To a block of wood called a sabot.
17. Are the projectile and cartridge ever attached to the same sabot?
Yes, in field guns, and the 12-pr. field-howitzer; the whole then constitutes a round of fixed ammunition.
18. What is the arrangement in case of the 32 and 24-pdr. field howitzers?
The projectile is separate from the charge, and the cartridge is attached to a block of wood called the cartridge-block, the object of which is to give a finish to the cartridge and fill the chamber.