Q, 3. Report on Mercer county, by I. C. White. With colored geological 

 county map, and 119 cuts in the text. 8°, pp. 233, 1880. Price $0 60, postage 

 $0 11. 



Q, 4. Report on Crawford and Erie counties, by I. C. White. With two 

 colored geological county maps, and 107 cuts in the text. Also, a Report on 

 a preglacial outlet for Lake Erie, by J. W. Spencer. With two maps of the 

 Lake region. 8°, pp. 406, 1881. Price $1 17, postage $0 18. 



R. Report on McKean county, and its geological connections with Came- 

 ron, Elk, and Forest counties, by C. A. Ashburner. With 33 page plates of 

 vertical and columnar sections, pictures of Rock city and Olean conglomerate, 

 Wilcox and Kane spouting wells, map of Howard Hill coal field, &c, and an 

 atlas of 8 sheets. 8°, pp. 371, 1880. Price of Volume and Atlas together 

 $1 70, postage $0 22. 



(R.) Atlas for McKean county of 8 sheets :— Colored geological county 

 map ; three topographical maps ; of Buffalo Coal Company tract, Alton coal 

 basin, and Potato Creek coal basin ; map of McKean oil district ; one sheet of 

 columnar sections between Bradford and Ridgway ; and 2 diagram sheets of 

 the Well account and Production account in the Bradford district. {Only 

 sold with Report JR.) 



R 2. Part II, Report on township geology of Cameron, Elk and Forest 

 counties, by C. A. Ashburner. (To appear about March 15, 1885.) 



(R 3.) Atlas for Cameron, Elk and Forest counties, of 11 sheets (pub- 

 lished November, 1884, in advance of the report) :— 3 colored geological 

 county maps ; 1 anticlinal and synclinal map ; 1 topographical map McKean 

 county ; 2 tract maps Forest and Elk counties ; 1 map Straight Creek coal 

 basin ; 2 sheets oil well sections ; and 1 sheet coal sections. Price $0 65, post- 

 age $0 08. 



V. Report on N. Butler county ; and (Part 2) special report on the Beaver 

 and Shenango river coal measures, by H. M. Chance. With a colored geolog- 

 ical map of N. Butler ; a contour local map around Parker ; a map of the an- 

 ticlinal rolls in the 6th basin ; a chart of the Beaver and Shenango rivers ; 

 profile section from Home wood to Sharon; Oil well records and surface sec- 

 tions ; and 154 cuts in the text. 8°, pp. 248, 1879. Price $0 70, postage $0 15. 



V 2. Report on Clarion county, by H. M. Chance. With a colored geo- 

 logical county map ; a map of the anticlinals and oil-belt ; a contoured map 

 of the old river channel at Parker ; 4 page plates, and 83 cuts in the text. 8°, 

 pp. 232, 1880. Price 80 43, postage $0 12. 



For the coal basins of Bradford and Tioga counties see report G. 



For the coal basins of Lycoming and Sullivan see report G 2. 



For the coal basins of Potter county see G 3. 



For the coal basins of Clinton county see G 4. 



For the coal in Wayne county see G 5. 



For the East Broad Top coal basin in Huntingdon county see F. 



For the mountain coals in Blair county see T. 



For the Broad Top coal measures in Bedford and Fulton counties see T 2. 



For the coal basins in Centre county see T 4. 



For coal analyses, see M, M 2, M 3. 



For classification of coals, see in M 2. 



For coal plants, see P, P 2. 



For fossil crustaceans in coal slate, see P 3. 



