Continued by, Report of Progress CC -- Report of progress in the counties of York, Adams, Cumberland and Franklin : illustrated by maps and cross-sections showing the magnetic and micaceous ore belt near the western edge of the Mesozoic sandstone and the two Azoic systems constituting the mass of the South Mountains, with a preliminary discussion on the Dillsburg Ore Bed and a catalogue of specimens collected in 1875.York sections map. Geological sections across York County, to illustrate the report of progress in 1874 / by Persifor Frazer, Jr. [title from back: Geological sections across York County] -- Section 1. Along the right bank of the Susquehanna from Chiques' Ridge 2 miles above the Columbia Bridge, to Bull's Run 5 miles below it. ...
Paged continuously.vol. I. Laurentian, Huronian, Cambrian and Lower Silurian formations, J. P. Lesle...
Contains geological map (first page of pdf), 26 figures, and 44 plates, and 3 map inserts as pdfs (s...
3 p. l., [I3]-I 127 p. front., illus., fold. pl., maps (part fold.) diagrs. 22 1/2cm.At head of titl...
Appendices: A. Section of the Palæozoic rocks in Blair county, by F. Platt and R.H. Sanders.--B.A. m...
Dix p., 1 l., D73 p. illus., fold. map. 23cm.At head of title: Second geological survey of Pennsylva...
x K, 420 K, p. plates, fold. maps. 22 1/2cm.(In Pennsylvania. Geological survey, 2d. [Report of prog...
At head of title: Second geological survey of Pennsylvania. Report of progress. F3 1888-1889.Mode of...
viiiH, 296H p. front., plates (part fold.) maps (part fold.) diagrs. 22 1/2cm.In Pennsylvania. Geolo...
Bradford map. Geological map of Bradford County / by J.P. Lesley, 1876 [title from back of map: Brad...
Appendix A to Report of progress R (not listed in above index) was issued in 1881 with title: Drilli...
Appendix: Extracts from H. D. Rogers' Memoir on the coal formation of Pennsylvania ... of the final ...
Folded plate and maps in pockets.pt. I. Eastern Allegheny county and Fayette and West-moreland count...
Also includes: Mining methods / by J.W. Harden. p. 396-400 T4.Includes: Analysis of Nittany Valley i...
L vii, 252 L p., 1 l. front., illus., plates (part fold.) maps (part fold.) diagrs. 22 1/2cm.At head...
Appendices: A. From Geology of Pennsylvania, vol. I ... by H. D. Rogers.--B. Notes on the Mehoopeny ...
Paged continuously.vol. I. Laurentian, Huronian, Cambrian and Lower Silurian formations, J. P. Lesle...
Contains geological map (first page of pdf), 26 figures, and 44 plates, and 3 map inserts as pdfs (s...
3 p. l., [I3]-I 127 p. front., illus., fold. pl., maps (part fold.) diagrs. 22 1/2cm.At head of titl...
Appendices: A. Section of the Palæozoic rocks in Blair county, by F. Platt and R.H. Sanders.--B.A. m...
Dix p., 1 l., D73 p. illus., fold. map. 23cm.At head of title: Second geological survey of Pennsylva...
x K, 420 K, p. plates, fold. maps. 22 1/2cm.(In Pennsylvania. Geological survey, 2d. [Report of prog...
At head of title: Second geological survey of Pennsylvania. Report of progress. F3 1888-1889.Mode of...
viiiH, 296H p. front., plates (part fold.) maps (part fold.) diagrs. 22 1/2cm.In Pennsylvania. Geolo...
Bradford map. Geological map of Bradford County / by J.P. Lesley, 1876 [title from back of map: Brad...
Appendix A to Report of progress R (not listed in above index) was issued in 1881 with title: Drilli...
Appendix: Extracts from H. D. Rogers' Memoir on the coal formation of Pennsylvania ... of the final ...
Folded plate and maps in pockets.pt. I. Eastern Allegheny county and Fayette and West-moreland count...
Also includes: Mining methods / by J.W. Harden. p. 396-400 T4.Includes: Analysis of Nittany Valley i...
L vii, 252 L p., 1 l. front., illus., plates (part fold.) maps (part fold.) diagrs. 22 1/2cm.At head...
Appendices: A. From Geology of Pennsylvania, vol. I ... by H. D. Rogers.--B. Notes on the Mehoopeny ...
Paged continuously.vol. I. Laurentian, Huronian, Cambrian and Lower Silurian formations, J. P. Lesle...
Contains geological map (first page of pdf), 26 figures, and 44 plates, and 3 map inserts as pdfs (s...
3 p. l., [I3]-I 127 p. front., illus., fold. pl., maps (part fold.) diagrs. 22 1/2cm.At head of titl...