Philadelphia History: Chronology of significant events
Anthracite coal introduced in Philadelphia. In History of the Falls of Schuylkill, Chas. V. Hagner describes the introduction of anthracite coal as follows: "White & Hazard were using in their rolling mill, bituminous coal. They knew of the large body of anthracite at the head of the Schuylkill, and early commenced making experiments with it.
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