<Li> Iron making--the substitution of coke for charcoal greatly lowered the fuel cost for pig iron and wrought iron production . Using coke also allowed larger blast furnaces, resulting in economies of scale . The cast iron blowing cylinder was first used in 1760 . It was later improved by making it double acting, which allowed higher blast furnace temperatures . The puddling process produced a structural grade iron at a lower cost than the finery forge . The rolling mill was fifteen times faster than hammering wrought iron . Hot blast (1828) greatly increased fuel efficiency in iron production in the following decades . </Li> <Li> Invention of machine tools--The first machine tools were invented . These included the screw cutting lathe, cylinder boring machine and the milling machine . </Li> <P> The share of value added by the cotton textile industry in Britain was 2.6% in 1760, 17% in 1801 and 22.4% in 1831 . Value added by the British woollen industry was 14.1% in 1801 . Cotton factories in Britain numbered approximately 900 in 1797 . In 1760 approximately one - third of cotton cloth manufactured in Britain was exported, rising to two - thirds by 1800 . In 1781 cotton spun amounted to 5.1 million pounds, which increased to 56 million pounds by 1800 . In 1800 less than 0.1% of world cotton cloth was produced on machinery invented in Britain . In 1788 there were 50,000 spindles in Britain, rising to 7 million over the next 30 years . </P> <P> Wages in Lancashire, a core region for cottage industry and later factory spinning and weaving, were about one - sixth those in India in 1770, when overall productivity in Britain was about three times higher than in India . </P>

Why was the industrial revolution called a revolution