DAETON.] 



NORTH AMERICAN GEOLOGY. 



735 



Pennsylvania— Continued. 



1882. Models of jjarta of central Penn- 



sylvania, Lesley, J. P. 

 Geologic map of Wyoming 



County, Sherwood, A. 

 Survey of Lehigh Gap, Chance. 

 Pure dolomite from Mount Alto 



district, McCreath. 

 Pre-Glaoial outlet of Lake Erie 



and origin of the lower Great 



Lakes, Spencer, .T. W. 

 Geology of Bedford and Fulton 



counties, Stevenson, Lesley, 



J. P. 

 Place of Sharon conglomerate. 



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

 Coal-lilce peat at Soranton, Fair- 

 child. 

 Thickness of glacier. Smock. 

 Section at St. Marys, Elk County, 



Ashburner. 

 Section at Schuylkill Gap, 



Chance. 



1883. Progress of geology, 1882, Hunt, 



T. S. 

 Culture and curing of tobacco, 



Killebrew. 

 Report of geological survey of 



Pennsylvania, Frazer. 

 Lower Merion and vicinity, Rand. 

 Report on coal mining, Chance. 

 Terminal moraine across Penn- 

 sylvania, Lewis, H. C. 

 Terminal moraine of eastern 



United States, Wright, G. F. 

 Wright's ice dam at Cincinnati, 



Lesley, J. P. 

 Relations at serpentine quarry, 



Chester County, Britton, J. H. 

 Review of geology of Chester. 



County, Rand, Frazer. 

 Potsdam from Berks County, 



Merrill, G. P. 

 Beoay of rocks. Hunt, T. S. 

 Geology of Lehigh and North- 

 ampton counties, Lesley, J. P. 

 Two distinct beds of iron ore in 



Bradford County, Claypole. 

 Southern boundary of glaoiation 



in Ohio, Wright, G. F. 

 Geology of Susquehanna River 



region, Lesley, J. P. 

 South Mountain gneiss. Hall, 



C. E. 

 Geology of Philadelphia County, 



by Hall, Frazer. 



Pennsylvania — Continued. 

 1883. Glacial boundary between New 

 York and Illinois, Wright, 

 G.F. 



Geology of Philadelphia, Frazer, 

 Lewis, H, C. 



Kingsmill sandstone, Claypole. 

 .Notes on progress of survej', Les- 

 ley, J. P. 



Equivalency of Catskill and 

 Ponent, Lesley, J. P. 



Geology and copper of Adams 

 County, Frazer. 



Glacial erosion and outlets of the 

 Great Lakes, Lesley, J. P. 



Report T2, by Stevenson, Science. 



Geology of Berks County, d'lnvil- 

 liers. 



Mehoopeny coal field, Lesley, 

 J. P. 



Terminal moraine of second Gla- 

 cial period, Chamberlin, T. C. 



Geology of Chester County, Les- 

 ley, J. P. ; Hall, C. E. ; Frr.zer. 



Survey of Susquehanna River 

 region, White, I. C. 



Notes on Radnor and vicinity, 

 Rand. 



On rocks from South Mountain, 

 Leidy. 



Thickness of glacier in New Jer- 

 sey, etc.. Smock. 



Age of gravels in Trenton, N. J., 

 Wright, G. F. 



Westward thinning of Paleozoios, 

 Lesley, J. P. 



Lakes and valleys in northeast- 

 ern Pennsylvania, Davis, W. M. 



Fault in Triassic near Yardley- 

 ville, Lewis, H. C. 



Origin of cross valleys, Davis, 

 W.M. 



Map of terminal moraine in Penn- 

 sylvania, Lewis, H. C. 



Report on Warren County, Carll, 

 Lesley, J. P. 



Drift near Philadelphia, Leidy. 



Drift of Lycoming County, 

 Meyer, A. 



Fossils in lower Ponent of middle 

 Pennsylvania, Claypole. 



Ice age in Pennsylvania, Lewis, 

 H.C. 



Catskill near Leroy, Claypole. 



Amphibole granite li-om Syone, 

 Stelzner. 



