NORTH AMERICAN GEOLOGY. 



771 



Pleistocene — Continued. 



Pennsylvania— Continued. 



1883. Lakes and valleys in northeastern 



Pennsylvania, Davis, W. M. 



Terminal moraine in Pennsyl- 

 vania, Lewis, H. C. 



Glacial erosion and outlets of the 

 Great Lakes, Lesley, J. P. 



Geology of Philadelphia, Frazer, 

 Lewis, H. C. 



Terminal moraine across Penn- 

 sylvania, Lewis, H. C. 



Drift near Philadelphia, Leidy. 



Drift of Lycoming County, 

 Meyer, A. 



Survey of Susquehanna River 

 region. White, I. C. 



Slate quarries in 1875 and struc- 

 ture of water gaps. Chance. 



Slate region of Lehigh and North- 

 ampton counties, Sanders. 



Geology of Lehigh and North- 

 ampton counties, Lesley, J. P. 



Supposed Glacial stride, Locust 

 Mountain, Lewis, H. C. 



Report on "Warren County, Carll, 

 Lesley, J. P. 



South Mountain gneiss, Pennsyl- 

 vania, Hall, C. E. 



Terminal moraine of second Gla- 

 cial period, Chamherlin, T. C. 



Ice age in Pennsylvania, Lewis, 

 H. C. 



Terminal moraine of eastern 

 United States, Wright, G. P. 



1884. Report on terminal moraine in 



Pennsylvania, etc., Lewis, 

 H.C.; Lesley, J. P. 



White's geology of the Sus- 

 quehanna River region, Am. 

 Nat. 



Ice of the Glacial period, Lewis, 

 H. C. 



Glaciation south of terminal mo- 

 raine in Pennsylvania, Lewis, 

 H. C. 



Glaciated area of North America, 

 Wright, G. F. 



Gorges and waterfalls, Davis, 

 W. M. 



Geology of Mercer County, Gris- 

 wold. 



1885. Township geology of Cameron 



County, Shaeffer, P. W. 

 Fossiliferons pebhle at Tacony, 

 Heilprin. 



Pleistocene — Continued. 



Pennsylvania — Continued. 



1885. Geologic atlas of counties of 



Pennsylvania, Lesley, J. P. 



Marginal kames, Lewis, H. C. 



Township geology of Elk County, 

 Pa., Ashburner. 



Bone cave in Pennsylvania, Dar- 

 ton. 



Fossiliferons pebbles, Philadel- 

 phia, Heilprin. 



Pebbles from borings in Philadel- 

 phia, Heilprin. 



Inventory of Glacial drift, Cham- 

 herlin, T. C. 



Methods of geologic investiga- 

 tion, Davis, W. M. 



Cutting on east side railroad, 

 Philadelphia, Koenig. 



Survey of Delaware County, Pa., 

 Hall, C. E. 



Geology, the lesson of the Phila- 

 delphia rocks, Heilprin. 



1886. Glaciation of the Lackawanna 



Valley, Branner. 



Marginal kames, Lewis, H. C. 



Clay at Grays Ferry road, Phila- 

 delphia, Heilprin, Koenig. 



Thickness of ice of northeastern 

 Pennsylvania, Branner. 



Grays Ferry road, near Philadel- 

 phia, Smith, A. H. 



Glaciation of Wyoming and Lack- 

 awanna valleys, Branner. 



Wyoming buried valley. Hill, 

 P. A. 



Archbald potholes, Ashburner. 



1887. Anthracite regions, Hill, P. A. 

 Bowlders along Appalachian 



rivers, White, I. C. 



Glacial strife in Wyoming- Lacka- 

 wanna region, Branner. 



Lehigh River section. Hill, F. A. 



Potholes at Archbald, Dana, J. D. 



Radnor Township, Delaware 

 County, Rand. 



1888. Columbia formation, MoGee. 

 "Field of rooks" west of Phila- 

 delphia, Martin, D. S. 



1889. Age of Philadelphia red gravel, 



Wright, G. F. 



A river pirate, Davis, W. M. 



Early man in the Delaware Val- 

 ley, Cresson. 



Rivera and valleys in Pennsyl- 

 vania, Davis, W. M. 



