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The "Wujing Zongyao" (literally "Collection of the Most Important Military Techniques") was the first book in history to record the written formulas for gunpowder solutions containing saltpetre, sulphur, and charcoal, along with many added ingredients. It also described an early form of the compass (using thermoremanence), and had the oldest illustration of a Chinese Greek Fire flamethrower with a double-acting two-piston cylinder-pump that shot a continuous blast of flame.
 
 
The "Wujing Zongyao" (literally "Collection of the Most Important Military Techniques") was the first book in history to record the written formulas for gunpowder solutions containing saltpetre, sulphur, and charcoal, along with many added ingredients. It also described an early form of the compass (using thermoremanence), and had the oldest illustration of a Chinese Greek Fire flamethrower with a double-acting two-piston cylinder-pump that shot a continuous blast of flame. More...

 
    Invention of Gunpowder
  Invention of Gunpowder
Gunpowder, reportedly produced from saltpetre, sulphur and charcoal, is a Chinese invention. Earliest records of the formula date to the 800s. The Chinese used gunpowder to propel rockets, and to produce incendiary and explosive projectiles thrown by...
 
       
 
         
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