(c) Separate Ammunition. When the powder charge is contained in bags separate from the projectile and containing not a fixed but a varying charge, it is called “Separate Ammunition.”
Artillery. All firearms not carried by hand, excepting machine guns. It is divided into two general classifications: (1) artillery of position, and (2) mobile artillery.
(1) Artillery of Position is that which is permanently mounted in fortifications.
(2) Mobile Artillery consists of two classes: first, artillery designed to accompany an army in the field; second, railway artillery which requires tracks for its transportation.
Ballistics. The science of hurling projectiles or of the motion of projectiles in their flight.
Bore. The hole which extends from the muzzle to the breech. The passageway for the projectile. That part of the tube which is bored out.
Breech. The rear end of the gun, tube, or barrel.
Caisson. A two-wheeled vehicle which supports an ammunition chest. The wheeled equipment of a gun section consists of one gun with its limber and one caisson with its limber. For a caisson section it consists of two caissons with their limbers.
Caliber (Calibre). The diameter between the highest points in the bore.
Carriage, gun. Usually understood to mean all the piece except the tube with its appurtenances and the limber.