What is gunpowder made of

Take of refined nitre, 75 parts; sulphur, 10 parts; best refined willow charcoal, 15 parts. Powder each separately, and mix intimately with a little water in a mortar. The paste may be rolled out into thin rods, cut into grains and dried on a board in the sun. On the large scale the grains are made by forcing the paste through sieves, dried by steam-heat and polished by rolling against each other in a barrel. Meal-powder is ungrained powder.

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