In the 1760s , a Scottish engineer , James Watt (1736-1819 ) invented an engine that could pump water three times as quickly as the Newcomen engine . Steam power also promoted important changes in other industries . The use of steam-driven bellows in blast furnaces helped ironmakers switch over from charcoal to coke , which is made from coal , in the smelting of pig iron . In the 1780s , Henry Cort (1740-1800 ) developed the puddling furnace , which allowed pig iron to be refined in turn with...











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