Language: eng / Topic: Geology -- Pennsylvania - Institutions - Michigan Memories Search Results

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1. Report of progress in the Venango county district. By John F. Carll. Observations on the geology around Warren. By F. A. Randall. Note on the comparative geology of northern Ohio and north-western Pennsylvania and western New York. By J. P. Lesley.

2. Report of progress on the brown hematite ore ranges of Lehigh county, with a description of the mines lying between Emaus, Alburtis and Fogelsville. By Frederick Prime, jr. ...