6 GEOLOGICAL SUEVEY OF PENN'A. 



Coal measures down to the bottom of the Devonian ; diagram map and sec- 

 tion of Third sand ; profile section from Meadville, S. W. ; 5 sheets of 

 grouped oil well sections ; 5 sheets of working drawings for well boring, 

 &G. ; diagram of daily rate of drilling six wells at Petrolia. 



I 4. Report on Warren county, by J. F. Carll. With a colored geologi- 

 cal county map, a map of the Warren oil region, and 2 sheets of oil well 

 sections. 8°, pp. 439, 1883. (Note— The first ip pages of this hook contain 

 oil well records ; see under Petroleum Fields below.) 



J. Report on the Oil Region, by H. E. Wrigley ; map and profile of line 

 of levels through Butler, Armstrong, and Clarion, by D. J. Lucas ; map and 

 profile of Slippery Rock creek, by J. P. Lesley. 5 maps and sections, a 

 plate and 5 cuts. 8°, pp. 122, 1875. 



K. Report on Greene and Washington counties, by J. J. Stevenson. 

 With two county maps. (Showing the calculated local depths of the Pitts- 

 burgh and Waynesburg coal beds beneath the surface,) and 3 page plates of 

 general sections. 8^, pp. 419, 1876. (Note.— Since the publication of this 

 hook tivo colored geological county Maps have been published^ and will be 

 found in pocket of volume K 3 described below.) 



K 2. First report on Fayette, Westmoreland and S. E. Allegheny 

 counties, (i. e., west of Chestnut Ridge,) by J. J. Stevenson. With 3 col- 

 ored geological county maps and 50 cuts in the text. 8^, pp. 437, 1877. 



K 3. Second report on Fayette and Westmoreland counties (the Lig- 

 onier Valley), by J. J. Stevenson. With 4 page plates and 107 cuts in text 

 80, pp. 331, 1878. (Note. — In a pocket in this volume will be found the col- 

 ored geological maps of Greene and Washington counties alluded to above.) 



K 4. Report on Monongahela river coal mines, from the West 

 Virginia State Line to Pittsburgh, (including some on the Youghiogheny 

 and other streams), by J. Sutton Wall. With a map of the region in a 

 pocket, 12 heliotype pictures, and 26 page plates. 8^, pp. 231, 1884. 



L. Report on the Youghiogheny coke manufacture, by F. Piatt ; Notes 

 on the coal and iron ore beds, by C. A. Young ; Report on methods of coking 

 by J. Fulton, (See G below) ; Report on the use of natural gas in the iron 

 manufacture, by J. B. Pearse and F. Piatt ; The Boyd's Hill gas well at Pitts- 

 burgh, by J. P. Lesley. With a map of the coke region, two folded plates 

 of coke ovens, and page plates and cuts in the text. 80, pp. 252, 1876. 



Q. Report on Beaver, N. W. Allegheny and S. Butler counties by 

 L C. White. With 3 colored geological county maps, and 21 page plates of 

 sections. 80, pp. 337, 1878. 



Q 2. Report on Lawrence county, and special Report on Correlation of 

 the Pennsylvania and Ohio coal beds, by I. C. White. With a colored geo- 

 logical county map and 134 cuts in the text. 80, pp. 336, 1879. 



Q 3. Report on Meroer county, by I. C. White. With a colored geolo- 

 gical county map and 119 cuts in the text. 8°, pp. 233, 1880. 



Q 4. Report on Crawford and Brie counties, by L C. White. With 

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

 on a pre-glacial outlet for Lake Erie, by J. W. Spencer. With two maps of 

 the Lake region. 8°, pp. 406, 188L 



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 Clean conglomer- 

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

 and an atlas of 8 sheets. 80, pp. 371, 1880. 



