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Coal Mining Tools 1800 S

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Late 1800s, mechanized mining equipment had been successfully in tro duced into many of ohios underground coal mines. from 1800 to about 1948, most of ohios coal was mined un-der ground. during most of the 19th century, coal was mined by 1850 1900 1950 2000 million tons 0 10 20 30 40 50 60 1930 1940 19 1990 2010

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