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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” quote by Howard Zinn
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““(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””

Howard Zinn

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