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The earliest Chinese paper was probably made from hemp and then the bark of the mulberry tree. Later, the Chinese used rags.
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. The first Chinese compasses were pieces of a magnetic mineral
called lodestone. -
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. -
Dripping water made the wheel turn. Every
quarter hour, drums would beat; and every hour, a bell would chime. The sounds let people know what time it was. -
The Chinese who first made gunpowder were alchemists, people who practiced a blend of science and magic known as alchemy.
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Printers used
woodblock printing to make the cards from thick paper. -
Before that time, coins were the only
form of currency. -
Early flamethrowers contained gunpowder mixed with oil.
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Movable type consists of separate blocks for each character.
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Rockets were powered by
a black powder made of saltpeter, charcoal, and sulfur. At first, rockets were used only in fireworks.
