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Content: How did the industrial workforce change between the 1820's and the 1840's? What were the effects on American society of changes in the workforce? The industrial workforce changed during this time in many ways because there were so many new advances in technology. Some examples include, a method of vulcanizing rubber, the sewing machine, interchangeable parts, the turret lathe which was used for cutting screws and other metal parts, the universal milling machines which replaced hand chiseling of complicated parts, and the precision grinding machine. All of these new inventions were brought into the factories and helped make work in factories more efficient. Another important thing is that the value of manufactured goods was now for the first time ever about equal to the value of agricultural products. 4. How did America's industrial revolution and the factory system change family life and women's social and economic roles? For women, they no longer had to be economic burdens so they moved off the farm and started to work in factories. Since they had to give up their role of Republican motherhood the factories promised a paternalistic system where they would promote Republican ideals to their children.