The various sorts of Powder are distinguished by the following marks on the heads of the barrels:—
| L G | Large grain. |
| F G | Fine grain. |
| R A | For rifle arms. |
| L G | Large grain. |
| F G | Fine grain. |
| R S | Re-stoved. |
Red L G, or F G, denotes powder of the best quality. White L G, or F G, is an inferior Powder for salutes, &c.
POWDER MAGAZINES.
To ascertain if a Magazine is damp.—Soak a piece of sponge in a solution of salt of tartar, or common salt and water: let it be well dried and weighed, and then be placed in the magazine, which, if damp, will cause the sponge to become heavier.
A small weight, suspended by a piece of catgut, or hair, will also discover moisture, causing the former to contract and the latter to lengthen.
POWDER BARRELS.
Whole Barrels contain 100 lb., and Half Barrels 50 lb., of powder, whether fine or coarse.
Dimensions of Powder barrels.