pABTON,] 



NORTH AMERICAN GEOLOGY. 



737 



Pennsylvaijja— qputinned. 

 1884. Geology of,, Mercer County, Gris- 

 wold. 

 Hamilton of middle Pennsyl- 

 vania, Claypole. 

 Trap dikes of southeastern Penn- 

 sylvania, Frazer. 

 Classification of Upper Devonian, 

 , Hall, J. 



Structure of copper Ijelt of South 

 , Mountain, Frsizer. 

 Studies of rooks of Cordilleras, 



. Wadsworth. 

 Position of Philadelphia gneiss, 



, Hitch,qo,ck, C, H. 

 Geology of Chj^^ter Valfey and 



vicinity, Rand. 

 Fossils from "Wilk^^Jjarre, Clay- 

 u PPle. 



Building stones, Lesley, J. P. 

 Geology of Snyder County, Med. 



Soc, Pennsylvania. 

 Flexible sandstone from Penn- 

 . sylvainia, Lewis, H. C. 

 Revision of coal .measures of 

 , Clearfield Cqnnty, Chance, 

 Lesley, J. P. 

 Por,tage in Perry County, Claypole. 

 Crumpling across Pennsylvania, 



.Claypole. 

 Weathering of Pottsville con- 

 glomerate, Winslow. 

 1885. Town geology, lesson of Phila- 

 delphia rooks, Hejlprin. 

 Report on anthracite region, 



A8hl)urner. 

 Map of A.dams, Franklin, and 

 Cumbeirland counties, Lesley, 

 J. P. 

 Glacial origin of Presqne Isle, 



Lake Erie, Ingersoll. 

 Bone cave in Pennsylvania, Dar- 



ton. 

 Pennsylvania before and after 

 elevation of the Appalachians, 

 Claypole. 

 Fossiliferous pebbles at Taoony, 



Heilprin. 

 Geologic atlas of counties of 



Pennsylvania, Lesley, J. P. 

 Geology of Huntingdon County, 



White, I. C. ; Lesley, J. P. 

 Nomenclature of Appalachian 



coal beds* White, I. C. 

 Work in Great Kanawha Valley 



in 1884, White, I. C. 

 Bull. 127 47 



Pennsylvania— C ont^n u ed . 

 1885. History of Taoonic question and 

 relations of the rocks. Hunt, 

 T. S. 

 Geology of natural gas, White, 



I.e. 

 Township geology, Cameron 



County, Shaeffer, P. W. 

 Archeau -Paleozoic contact in 

 southeastern Pennsylvania, 

 Frazer. 

 Analyses, Delaware County, 



Genth. 

 Map of the United States, McGee. 

 Great trap dike across south- 

 eastern Pennsylvania, Lewis, 

 H. C. 

 Notes on metamorphism, Steven- 

 son. 

 Fossiliferous pebbles, Philadel- 

 phia, Heilprin. 

 Pebbles from boring in Philadel- 

 phia, Heilprin. 

 Amount of chemical erosion in 

 limestone of Center County, 

 Ewing. 

 Conditions modifying fossil fau- 

 nae, Williams, H. S. 

 Structure of English and Ameri- 

 can coals, Wethered. 

 Vertical range of certain fossils 

 in Pennsylvania and. New York, 

 Claypole. 

 Geology of natural gas. Ash- 

 burner. 

 Progress of geology, 1883, Hunt, 



T.S. 

 Gravels of south Delaware pen- 

 insula, Chester. 

 Township geology of Elk County, 



Ashbumer. 

 Fish remains in Silurian of Penn- 

 sylvania, Claypole. 

 Relations of Chemung and 

 Waverly, New York and Penn- 

 sylvania, Hall, J. 

 Fossil ore in Huntingdon County, 



Billin. 

 Materials of the Appalachians, 



Claypole. 

 Cutting on East Side Railroad, 



Philadelphia, Koenig. 

 Survey of Delaware County, 



Hall, C. E. 

 Letter on Nittany "S'^alley ores, 

 d'Invilliers. 



