184 ADDITIONS TO THE LIBRARY. 



Peacoch, B. A. Second Supplement to ' Saturated Steam.' 8vo. 

 London, 1884. 



Penck^ A. Die Eiszeit in den Pyrenaen. 8vo. Leipzig, 1883. 



. Alte und neue Gletscher der Pyrenaen. 8vo. Salzbursr, 



1884. 



. Geographische Wirkungen der Eiszeit. 8vo. Berlin, 1884. 



. Mensch und Eiszeit. 4to. Brunswick, 1884. 



Pennsylvania. Second Geological Survey. Eeports. Presented hy 

 the Survey. 



A. Historical Sketch of Geological Explorations in Pennsylvania 



and other States, by J. P. Lesley. 8vo. Harrisburg, 



1876. 



Ag. A Special Eeport to the Legislature upon the Causes, Kinds, 

 and amount of Waste in mining Anthracite, by Eranklin 

 Piatt; with a Chapter on the Methods of Mining, by 

 John Price Wetherill. . 8vo. Harrisburg, 1881. 



Ag. First Eeport of Progress in the Anthracite Coal Eegion. 

 The Geology of the Panther Creek Basin or Eastern End 

 of the Southern Eield, by C. A. Ashburner. 8vo. Har- 

 risburg, 1883. And Atlas. 8vo. 



Ag. Atlas, "Western Middle Anthracite Eield. Part 1. 8vo. 



Ag. Grand Atlas. Division II. Anthracite Coal Eields. Part 1. 

 Eol. Harrisburg, 1884. 



AC. Eeport on the Mining Methods and Appliances used in the 

 Anthracite Coal Eields, by H. M. Chance. 8vo. Harris- 

 burg, 1883. And Atlas. 8vo. 



B. Preliminary Eeport on the Mineralogy of Pennsylvania, by 



E. A. Genth; with an Appendix on the Hydrocarbon 

 Compounds, by S. P. Sadtler. 8vo. Harrisburg, 1875. 



Bg. Second Preliminary Eeport on the Mineralogy of Pennsyl- 

 vania, by E. A. Genth. 8vo. Harrisburg, 1876. 



C. Eeport of Progress in the district of York and Adams Coun- 



ties, by Persifor Erazer, Jun. 8vo. Harrisburg, 1876. 



Cg. Eeport of Progress in the Counties of York, Adams, Cumber- 

 land, and Eranklin, by Persifor Erazer, Jun. 8vo. Har- 

 risburg, 1877. 



Cg. The Geology of Lancaster County, by Persifor Erazer, Jun. 

 8vo. Harrisburg, 1880. And Maps. 



C4. The Geology of Chester County. Edited by J. P. Lesley. 

 8vo. Harrisburg, 1883. 



Cg. The Geology of Philadelphia County and of the Southern 

 Parts of Montgomery and Bucks, by C. E. Hall. 8vo. 



Harrisburg, 1881. 



