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Iron and charcoal were put together. The iron became stronger/ harder when it was left in furnaces filled with charcoal
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Craftsman used crucibles to smelt iron with charcoal.
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Used to smelt iron which replaced the use of wood and charcoal. Both became scarce.
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Thomas Newcomen built the 1st successful steam engine.
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Henry Cort made the steel roller for the production of steel
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Production of steel using molten pig iron. The impurities taken away from iron made stronger steel
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The 1st skyscraper was built in Chicago
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The Brooklyn Bridge was open for the public. It had steel wires that held it.
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Steel production was growing. The military wanted equipment which made the industry grow so much.