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The printer first drew characters (symbols) on
paper. He then glued the paper to a wooden block. When
the glue was dry, the printer carved out the wood around
the characters, leaving the characters raised on the wood. -
Chinese alchemists experimented with mixtures of natural ingredients, trying to find a substance that might allow people to live forever which resulted in the creation of gunpowder.
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Early flamethrowers contained gunpowder mixed with oil. The Chinese used them to spray enemies with a stream of fire.
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Artillery shells were used to terrify the enemy and their horses.
