Gunpowder had its origin in China way back in the 7th century. Though
             most historians confirm that the Chinese were the first to discover it we
             are not able to ascribe the discovery to any single person. While some say
             that the Chinese alchemists discovered gunpowder (also known as black
             powder) there is another story that states that a Chinese cook accidentally
             stumbled upon it when he mixed up certain chemicals in this cooking vessel.
             Initially the Chinese used gunpowder only in fireworks though gradually
             gunpowder began to be used for military purposes. The Chinese used to stuff
             it inside bamboo sticks called as pao chuk' and used it in their warfare.
             [5thofNovember]. By the turn of the fourteenth century gun powder
             technology had spread to every country in the world and since that time it
             has been used as the main propellant for fireworks until the nineteenth
             century when nitro cellulose began to replace it.
             The general composition of gunpowder is 75% of sodium nitrate
             (saltpeter), 15% charcoal and 10% of sulphur. [Dept of Ordinance and
             Gunnery]. That the Chinese knew the gun powder as early as the 9th century
             is attested by the following text from one of the earliest Chinese books
             Classified Essentials of the Mysterious Tao of the True Origins of Things'
             by Chen Yuan Miao Tao Yao (850 A.D), "Some have heated together sulphur,
             realgar, and saltpetre with honey; smoke (and flames) result, so that their
             hands and faces have been burnt, and even the whole house (where they were
             working) burned down" [Joseph Needham]. The first ever evidence of
             Gunpowder in the western world is from the text Liber Ignum' (The book of
             fire 1280 A.D) by Marcus Graecus where he explains the composition of
             gunpowder, "The second kind of flying fire is made in this way. Take 1 lb.
             of native sulfur, 2 lb. of linden or willow charcoal, 6 lb. of saltpeter,
             which three thing are very finely p...