H. W. Halleck,
Elements of Military Art and Science
“ The case or canister-shot is prepared by filling a tin canister with grape-shot or musket-balls, and attaching it to the cartridge by means of a sabot. There being two sizes of grape-shot, and one of musket-balls, we have three kinds of canister-shot calculated to reach at different distances. The three sizes of shot are frequently mixed in the same canister. This projectile is particularly effective against lines of infantry and cavalry, when the distance is short. ”
