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The origins:
-The agrarian revolution
-The demographic revolution -
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inventor and engineer who developed the first process for manufacturing steel inexpensively
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Meucci devised an electromagnetic telephone as a way of connecting his second-floor bedroom to his basement laboratory, and thus being able to communicate with his wife.
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American George Brayton invented the first commercial liquid-fuelled internal combustion engine.
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New sources of energy
New industries
New production system -
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Edison had built his first high resistance, incandescent electric light.
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