Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 124
and in the course of time, as other layers ofsand and dirt were piled on top, the mass ofvegetation grew harder and blacker, andharder and blacker, and to-day we call it coal.Mother Earth is still making coal in someplaces—for instance, in the Dismal Swampof Virginia and North CaroHna, and in…
Children's literature
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