Address Delivered at the Meeting of the Association of American Geologists and Naturalists, Held in Washington, May, 1844

Reports on the Combustible Qualities of the Semi-anthracites of the Trevorton Coal Fields, in the Shamokin Basin, Pennsylvania

The Geology of Pennsylvania; a Government Survey. With a General View of the Geology of the United States, Essays on the Coal-formation and Its Fossils, and a Description of the Coal Fields of North America and Great Britain. (Maps.) [With Plates and Diagrams.]: Volume 4

The Geology of Pennsylvania; a Government Survey. With a General View of the Geology of the United States, Essays on the Coal-formation and Its Fossils, and a Description of the Coal Fields of North America and Great Britain. (Maps.) [With Plates and Diagrams.]: Volume 3

The Geology of Pennsylvania: A Government Survey

The Geology of Pennsylvania: A Government Survey, Volume 2

The Geology of Pennsylvania: A Government Survey, Volume 2, Issue 1

Report on the Geological Survey of the State of New Jersey

The Geology of Pennsylvania: A Government Survey, Volume 1

Annual Report on the Geological Survey of the State of Pennsylvania

Annual Report on the Geological Exploration of the State of Pennsylvania

The Geology of Pennsylvania: A Government Survey, Volume 1

Description of the Geology of the State of New Jersey: Being a Final Report

Annual Report on the Geological Survey of the State of Pennsylvania

Report on the Geological Survey of the State of New Jersey

The Geology of Pennsylvania: A Government Survey: with a General View of the Geology of the United States, Essays on Coal-formation and Its Fossils, and a Description of the Coal-fields of North America and Great Britain, Volume 1

Annual Report on the Geological Survey of the State of Pennsylvania

The Geology of Pennsylvania: A Government Survey

Annual Report on the Geological Survey of the State of Pennsylvania

pt. II., cont'd. book VIII. Eighth Palaeozoic district, or anthracite coal-basins, and encircling belts of the older Carboniferous rocks. book IX. Ninth Palaeozoic district, or bituminous coal-fields and their associated older Carboniferous strata. pt. III. Mesozoic red sandstone series. pt. IV. Igneous rocks and minerals, veins and ores