n. An explosive mixture of saltpeter, sulphur, and charcoal, reduced to fine powder, and thoroughly incorporated with each other, then granulated, cleaned or dusted, glazed or polished, and dried.n. Picric-acid powders (these are not generally stable);n. ammonium-nitrate powders (these are highly hygroscopic);n. gun-cotton powders;n. nitroglycerin and guncotton powders. The first two classes have practically been abandoned. Smokeless powders are designated from their appearance, the name of the inventor, or arbitrarily, as cordite, Peyton, poudre B., etc.