H6, Report of Progress in Jefferson CotNTY— 1880; ^vitll colored 

 map of oouaiy. By \V. G. Piatt. Prioe, t>0 ou ; postage, gO IJ. 



H." A REViSION OF THE Bl TUMINOUS Co.\ 1. MEASURES OF CLEARFIELD 



County — 1884 : with a colored geological county map ; outcrop map of the 

 Houtzdale Bajsin, and coal bed sections iu the text. By H. M. Chauce. Price, 

 f ; postage, § 



IK Quaker Hill Coal Basin, Warren County. By John F. Carll. 

 (Sea Reports Petroleum Fields.) 



K, Report on Greene and Washington Counties— 1875, Bituminous 

 Coal Fields. By J. J. Stevenson, 8 vo., pp. 420, illusti-ated by 3 sections and 2 

 county maps, showing the depth of the Pittsburgh and W'aynesburg coal bed 

 beneath the surface at numerous points. Price iu paper, §0 65 ; postage, §0 1(5. 



K-. Report op Progress in the Fayette and Westmoreland Dis- 

 trict OF the Bituminous Coal Fields of Western Pennsylvania — 1876. 

 By J. J. Stevenson ; pp. 437, illustrated by 50 ivood-cuts and 3 county maps, 

 colored. Part I. Eastern Alleglieny Count}', and Fayette and Westmore- 

 land Counties, west from Chestnut Ridge. Price, §1 40 ; postage, SO 20. 



K3, Report ok Progress in the Fayette and Westmoreland Dis- 

 trict OF the Bituminous Coal Fields of Western Pennsylvania— 1877. By 

 J.J.Stevenson. Pp.331. Partll. The Ligonier Valley. Illustrated witli 

 107 xvood-cuts, 2 plates, and 2 county maps, colored. Price, $1 40 ; i:)ostage, 

 ?0 16. 



M, M2 and W, Reports of Progress in the Laboratory. By An- 

 drew 8. McCreath. Contains coal analyses. 



P. Report and Atlas of the Coal Flora. By Leo Lesquereux. 



P-. Report of the Permian and Upper Carboniferous Flora. 

 By Wm. M. Fontaine and I. C. White. (See Miscellaneous Reports.) 



Q,. Report of Progress in the Beaver River District of the Bitu- 

 minous Coal Fields of Western Pennsylvania. By I. C. White. Pp. 

 3:37, illustrated with 3 Geologicai maps of parts of Beaver, Butler, and Alle- 

 gheny' Counties, and 21 p^a<es o/ t'e?'<icai sections. 1875. Price, ?1 40; post- 

 age, ?0 20. 



Q,2. Report of Progress in 1877. The Geology of Lawrence County, 

 to which is appended a Special Report on the Correlation of the Coal 

 Measures in Western Pennsylvania and Ea.stern Ohio. 8 vo., pp. 336, with 

 a colored Geological Maj> of the county, and 134 vertical sections. By I. C. 

 White. Price, ?0 70 ; postage, §0 15. 



Q,"-. Report of Progress in 1878. The Geolog}' of Mercer (Bounty, 

 by I. C. White, with a colored geological maj) of county, and 119 verticjil sec- 

 tions. 8 vo., pp. 233. Price, ?0 60; i)o.stage, SO 11. 



R. Report OF Progre.ss. The fieology of McK fan County, and ii.s con- 

 nection with that of Cameron, Elk, and Forest, with Atlas containing 8 

 sheets of maps and .sections. B3' Chas. A. Ashbunier. Price, fl 70; jHwlago, 

 10 22. 



T. Coal Measure!?, Blair county. By Franklin Piatt. 



T^. Coal Measures, Bedford and Fulton Counties. By J. .F. Ste- 

 venson. (See Reports Central Penn.sylvania.) 



V. Report OF Procjress — 187S. Part L The Northern Townships of Biil- 

 ler county. Part II. A special survey made ui 1H75, along the Beav<'r :in<l 

 Shenango rivers, in Beaver, IjAWRence, and Merckr Counties. 8 vo., 

 • pp. 248, with 4 ma]>s, 1 i)rofile .^pcl.ion and 154 vortical sections. By II. Mur- 

 tyn Chauce. Price, |0 70; postaj^o, fO 15. 



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