| 21. | The land contained part of a massive anthracite coal field.
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| 22. | Anthracite is classified into three grades, depending on its carbon content.
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| 23. | They were located in a section of the anthracite Northumberland.
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| 24. | This means of transportation ultimately led anthracite to the New York markets.
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| 25. | Already the importance of anthracite as an indispensable industrial fuel was slipping.
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| 26. | Hot blast allowed blast furnaces to use anthracite or lower grade coal.
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| 27. | Until the end of the 19th century, anthracite was mined here.
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| 28. | Anthracite mining was historically a prevalent industry in the watershed.
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| 29. | The Anthracite mine shut down in 1904 and was abandoned.
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| 30. | The furnace was known as the Roaring Creek Anthracite Water Power Furnace.
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