Quote by Howard Zinn
““(before the Bessemer process, iron was hardened into steel at the rate of 3 to 5 tons a day; now the same amount could be processed in 15 minutes). Machines””
““(before the Bessemer process, iron was hardened into steel at the rate of 3 to 5 tons a day; now the same amount could be processed in 15 minutes). Machines””