Report of progress 1874-1889, A-Z. - Geological Survey of Pennsylvania; Pennsylvania. Board of Commissioners for the Second Geological Survey (Harrisburg, Board of Commissioners for the Second Geological Survey, 1875)
35 vols. are atlases.
Several volumes have no general title.
J. Peter Lesley, State Geologist.
A list of these reports with index may be found in the appendix to "A general index of the Final summary report of the geology of Pennsylvania," 1895.
Appendix A to Report of progress R (not listed in above index) was issued in 1881 with title: Drillings for coal in Sergeant Township, McKean County. A correspondence by N. F. Jones, J. P. Lesley, and Chas. A. Ashburner.
Keywords: Geology -- Pennsylvania; Coal -- Pennsylvania