Darby smelts iron with coke at Coalbrookdale

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Abraham Darby I, having leased a furnace at Coalbrookdale in Shropshire the previous year, produced iron using coke instead of charcoal. The immediate product was thin cast cookware rather than forge-grade iron, and adoption elsewhere took another half-century, but the substitution broke the link between the output of the iron trade and the acreage of managed woodland.

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