... also promoted Coalbrookdale iron; he did this by making a bridge out of iron, 'The Iron Bridge'. This would have been impossible 50 years earlier. This provided great advertisement for his company and his iron was soon in huge demand. Although the Darby's discoveries were extremely important in the mass production of cast iron, they did not discover how to mass-produce wrought iron. The current process was done in forges, by heating and hammering the cast iron repeatedly to remove impurities. This was slow and expensive though. Then along came Henry Court who had discovered a better and cheaper method to mass produce wrought iron. His new method was as follows. He had constructed a special furnace called a reverberatary furnace. In this furnace the iron was kept separate from the fuel with a blocking bar. This meant the iron never came in contact with the fuel, so ordinary cheap coal ...

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