DAKTOM.] 



NORTH AMERICAN GEOLOGY. 



739 



Pennsylvania — Continued. 



1887. Faunae of upper Devonian, Wil- 



liams, H. S. 



Glacial strisB in Wyoming-Lacka- 

 wanna region, Branner, 



Glaoiation; its relations to the 

 Lackawanna- Wyoming region, 

 Branner. 



Lehigh River section. Hill, P. A. ; 

 Winslow, A. 



Lower Carboniferous, Stevenson. 



Materials of the Appalachians, 

 Claypole. 



Northern coal field. Hill, P. A. 



Oil and gas, Carll. 



1888. Map and coal of Cambria County, 



Fulton. 



Coal, Ashburner. 



Columbia formation, McGee, 



Cross section of crest of the Alle- 

 ghany Mountain, Fulton. 



Four great sandstones, Claypole. 



"Field of rocks" west of Phila- 

 delphia, Martin, D. S. 



Head of Chesapeake Bay, McGee. 



Natural gas, Carll. 



Sections in Cambria County, 

 Fulton. 



Notes on Cambria County, Ful- 

 ton. 



Pittsburg coal bed and its dis- 

 turbances, Wasmuth. 



Pyrite in bituminous coal, Brown, 

 A. P. 



Method in geologic investigation, 

 Davis, W. M. 



Southern anthracite coal field 

 and its disturbances, Wasmuth. 



State line serpentines, Chester. 



Antiquity of man in Delaware 

 Valley, Abbott, C. C. 



Structural geology of Carbon- 

 iferous, Wasmuth. 



Three formations of the middle 

 Atlantic Slope, McGee. 



Types of Devonian system in 

 North America, Williams, H. S. 



Notes in Cambria County, Pros- 

 ser and Hardin. 



1889. Rivers and valleys, Davis, W. M. 

 Rocks of Philadelphia and New 



York, Rand. 

 New mines in Somerset County, 



Prosser. 

 Slate quarries, Merrill, G. H. 

 Dictionary of fossils, Lesley, J. P. 



Pennsylvania — Continued. 



1889. Early man in Delaware Valley, 



Cresson, 



Map of Somerset County, Ful- 

 ton. 



Petroleum and gas in New York, 

 Ashburner. 



Atlases of coal fields, Hill, F. A. 



Revision of coal section at Wel- 

 lersburg, Somerset County, 

 Lesley, J. P. 



Antecedents of man in the Po- 

 tomac Valley, McGee. 



A river pirate, Davis, W. M. 



Bernice anthracite basin, Clag- 

 horn. 



Age of Philadelphia red gravel, 

 Wright, G. P. 



Champlain in Susquehanna Val- 

 ley, Bashore. 



Building stones, Merrill, G. P. 



1890. Analysis of serpentine, Catlett. 

 Casts of flattened scolithus. Wan- 

 ner. 



Clay in Northumberland County, 

 analysis, Catlett. 



Diatoms from river clays of Phil- 

 adelphia, Woolman. 



Fossil in caves in limestone, 

 Leidy. 



Fractured strata in Bedford 

 County, Stevenson. 



Glacial boundary, Chamberlin> 

 Wright, G. F. 



Glacial phenomena in the Beaver 

 Valley, Foshay and Hice. 



History of Niagara River, Gilbert, 

 G. K. 



History of Glacial deposits of 

 Ohio Valley, White, I. C. 



Iron ores. Hunt, T. S. 



Making of Pennsylvania, Clay- 

 pole. 



Macfarlane's Railway Guide, Les- 

 ley, Lewis, H. C. ; White, I. C. 



Microscopic structure of oolite, 

 Barbour. 



Origin of pressure of gas, White, 

 LC. 



Pre-Glacial drainage of western 

 Pennsylvania, Foshay. 



Report on New Boston and Morea 

 coal lands, Lyman. 



Report on oil and gas, Carll. 



Serpentines of southeastern Penn- 

 sylvania, Rand. 



