_R. L. G. Powder_ is used for full charges in guns of 7 inches and upward where the weight of charge does not exceed forty pounds. It passes through the 4 and rests on the 8 mesh sieve. _P. Powder_ is used for battering-charges of all rifled guns of 7 inches and above, up to 12½ inches, and for all service charges of forty pounds and upward. The grain is cubical, ⅝ of an inch on a side. _P.² Powder_ is used with the 12½-inch and upward. This powder is cubical, 1½ inches on a side. Gunpowder is graduated according to its fitness for use into six classes: Class I. _Service._—All new powder. All returned powder found to be uninjured. Class II. _Blank._—Powder from broken-up cannon-charges too dusty for Class I. Powder from broken-up small-arm ammunition. Service powder found too dusty for use in cartridges. Class III. _Shell._—Powder found too dusty for Class II. Class IV. _Doubtful._—All powder returned into store and waiting examination. Class V. _Condemned for Sale._—Powder too much deteriorated for the higher classes. Class VI. _Condemned for Extraction._—Powder obtained from shells, and powder found to have been too much damaged for any use except for the extraction of the saltpetre. CARTRIDGES. Cartridge-bags are made either of serge or of silk cloth. Serge is used in all smooth-bores and breech-loading rifles, except for the blank cartridges of smooth-bores, which are of silk. Silk is used for all muzzle-loading rifles. Cartridges are always filled by weight and not by measure. All cartridges are both choked and hooped, the number of hoops depending on the length of the cartridge. These hoops are either of twine or braid, according to the size and weight of cartridge and the stiffness required. All cartridges are marked in black with the nature of the gun for which they are intended, the weight of powder, and the monogram of the station where they were filled. Cartridges are packed in magazines, in corrugated brass tanks which are either rectangular or pentagonal. Cartridges for calibres above 8 inches are not transported about the ship’s decks in passing-boxes, but in zinc cylinders with a lock cover. PROJECTILES. The projectiles used are shot, shell, shrapnel, and case-shot. [Illustration: Woolwich Shrapnel.] [Illustration: Woolwich Common Shell.] [Illustration: Woolwich Case-Shot.] [Illustration: Woolwich Double Shell.]