The steam engine developed by the Scotsman James Watt (1736-1819) from 1769 was much more efficient in terms of power and fuel consumption than earlier models, and it significantly increased the possible uses for this key invention of the Industrial Revolution (1760-1840).
More about: Watt Steam EngineDefinition
Timeline
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1769James Watt patents his development of the steam engine.
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1784James Watt and Matthew Boulton perfect their development of the steam engine.