Lesley, J. Peter; Historical Sketch of Geological Explorations in Pennsylvania & other States. Second Geological Survey of Pennsylvania, Harrisburg, 1874 - 76. Octavo, pp. 260, 26 page appendix containing the annual reports of the state, frontispiece, folded map in pocket.

The set is complete and in the original brown cloth, gilt spine titles, light scuffing to boards, rear inner hinge nicely re-enforced, very good.
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