cross-section sheets, all relating to the Mahaiioy-Shamokin Biisin ia Schuyl- 

 kill, CoUiiiibia, and N<)rtluiniberland counties. In press. Cliaa A. Ash- 

 burner, Geologist in Charge, and A. W. Sheafer and liard Wells, Assistant 

 Geologists. Price, $ ; postage, $ 



AA. Atlas Northern Field, Part I, 1SS4. Contains G mine sheets be- 

 tween Wilkes Barre and Nanticoke, 3 cross-section sheets and — colunniar 

 section sheets, all relating to the Wyoming Basin in Luzerne county. In 

 press Chas. A. Ashburner, Geologist in Charge, and Frank A. Hill, Assist- 

 ant Geologist. Price, $ ; postage, $ 



G-« Part II. Loyalsock (^oal Basin, Sullivan County. By Frank- 

 lin Piatt. (See Reports Central Pennsylvania.) 



BITUMINOUS COAL FIELDS AND SURROUNDING AREAS. 



F. Part II. East Broad Top District, Huntingdon County. By 

 Chas. A. Ashburner. (See Reports Central Pennsylvania.) 



G. Rkport of Progress in Bradford and Tioga Counties — 1874-8. 

 I. Limits of the Catskill and Chemung Formation. By Andrew 

 Sherwood. II. Description of the Barclay, Blossburg, Fall Brook, 

 Arnot, Antrim, and Gaines Coal Fields, and at the Forks of Pine 

 Creek in Potter County. Bj^ Franklin Piatt. III. On the Coking of 

 Bituminous Coal. By John Fulton. Illustrated with 2 colored Geological 

 count3' 7naps, 3 page plates, and 35 cuts. 8 vo., pp. 271. Price, $1 00; post- 

 age, $0 12. 



G=. Part II. Coal Basins, Sullivan and Lycoming Counties. By 

 Franklin Piatt. (See Reports Central Pennsylvania.) 



G^. Report of Progress in 1876-9. The Geology ot Potter County, 

 bj' Andrew Sherwood. Report on the Coal Fields, by Franklin Piatt, with 

 a colored geological map of the county, two folded plates, and two page plates 

 of sections. 8 vo., pp. 120. Price, $0 58; postage, $0 08. 



G'. Report of Progress. Part I. Geology of Clinton County. 

 Part II. A special study of the Carboniferous and Devonian Strata 

 along the West Branch of Susquehanna River. By H. Martyn Chance. In- 

 cluded in this report is a description of the Renovo Coal Basin, by Chas. 

 A. Ashburner, and notes on the Tangascootack Coal Basin in Centre and 

 Clinton Counties, by Franklin Piatt. Price, $1 05; postage, $0 12. 



H. Report of Progress in the Clearfield and Jefferson District 

 OF the Bituminous Coal Fields of Western Pennsylvania — 1874. By 

 Franklin Piatt. 8 vo., pp. 29o, illustrated by 139 cuts, 8 maps, and 2 sections. 

 Price in paper, $1 50; postage, $0 13. 



H-. Report of Progress in the Cambria and Somerset District 

 OF the Bitu:.iinous Coal Fields of Western Pennsylvania — 1875. By F. 

 and W. G. Piatt. Pp. 194, illustrated with 84 wood-cuts, and 4 maps and sec- 

 tions. Part I. Cambria. Price, $1 00 ; postage, SO 12. 



H3, Report of Progress in the Cambria and Somerset District 

 OF THE Bituminous Coal Fields of Western Pennsylvania — 1876. By F. 

 and W. G. Piatt. Pp. 348, illustrated by 110 wood-cats and G maps and 6-ec- 

 tions. Part II. Somerset. Price, $0 85 ; postage, fO IS. 



H^. Report of Progress in Indiana County— 1877. Hy W. G. Piatt. 

 Pj). 31(5. With a colored map f)f the county. Price, ?0 80; postage, iO 14. 



H5. Report OF Progress in Armstrong County— 1879. By W.G.Piatt. 

 Pp. 338. With a colored map of the c()u:ity. Price, gO 75 ; postage, $0 16. 



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