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The first paper was most likely made from hemp and bark of the mulberry tree. Laer paper was made from rags.
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The first steel was made from cast iron.They then found out blowing air into molten or melted cast iron"s chemical reaction would cause it to turn to steel.
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people used a magnetic mineral called lodestone. they put it on a peice of wood then in a bowl of water to determine the direction. Over time they were improved with a steel needle.
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The chinese arranged a series of paddles in a wheel. People waked on a tredmill to turn the paddlewheel making the boat move through the water.
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Before the bridges were changed they were rested on semi circles. A new and improved bridge that used a smaller arch was invented. These bridges were more broad and flatter than semi-circle bridges. This new bridge took less material and was stronger.
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Printing was started with woodblock printing. First, you would right on the paper then glue it onto the woodblock. Once dried the woodblock would have letters sticking up from the paper. Later on, a whole industry was opened.
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The chinese made a wheel that made a complete turn every 24 hours. Water made the wheel move. Every hour a bell would chime, every quarter hour drums would beat letting people know the time.
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Paper money was printed with wood blocks and soon they were made with many blocks to make many at many at a time. Before paper money coins were the only form of money.
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printers used woodblock printing to make the cards by thick paper. Famous artists would draw the designs that were on the back of the card.
