Historical sketch of geological explorations in Pennsylvania and other states, [electronic resource] by J. P. Leslley. With an appendix containing the annual reports of the state geologist to the board of commissioners.
Imprint
Harrisburg, Pub. by the Board of commissioners for the Second geological survey, 1876.
At head of title: Second geological survey of Pennsylvania: 1874-'5-'6.
"The Geological society of Pennsylvania; and what it did to bring about the first Geological survey of the state": p. A29-52A.
fold. map in pocket.
Reproduction
Electronic text and image data. Ann Arbor, Mich. : University of Michigan, Digital Library Initiatives, 2000. Includes both TIFF files and keyword searchable text. [Making of America] This volume is made possible by a grant from the Andrew W. Mellon Foundation as part of Making of America IV: the American voice, 1850-1877.