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3 Biggest Coal Mines 1750 1900

3 Biggest Coal Mines 1750 1900

3-1972 A History of Appalachian Coal Mines Kenneth Lasson University of Baltimore School of Law . The biggest and richest deposits of anthracite lay in northeastern America princi- . Seams were not found in Ohio until 1750.10 By 1760 most of the colonies which had coal fields

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