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1. The Upper Freeport Coal Bed along Laurel Ridge in Preston County of West Virginia.

["<p> Pamphlet. \"Read before the American Philosophical Society, February 5th, 1875.\"</p>"]

2. Notes on the geology of West Virginia, no. II.

3. Surface geology of south-west Pennsylvania and adjacent portions of West Virginia and Maryland.

4. Notes on the geology of West Virginia.