Hazard, Erskine, 1789-1865. History of the introduction of anthracite coal into Philadelphia / by Erskine Hazard, Esq., communicated to the Society, Feb. 5th, 1827 ; and a letter from Jesse Fell, Esq., of Wilksbarre, on the discovery and first use of anthracite in the valley of Wyoming, read at a meeting of the Council, Feb. 21st, 1827.

History of the introduction of anthracite coal into Philadelphia / by Erskine Hazard, Esq., communicated to the Society, Feb. 5th, 1827 ; and a letter from Jesse Fell, Esq., of Wilksbarre, on the discovery and first use of anthracite in the valley of Wyoming, read at a meeting of the Council, Feb. 21st, 1827.

Detached from Memoirs of the Historical Society of Pennsylvania, v. 2, pt. 1, p. 155-164, 1827.