DASTOH.] 



NORTH AMERICAN GEOLOGY. 



755 



Pike, J. W. Preservation of fossil in- 

 sects and plants on Mazon Creek. 



Science (edited by Miohels), toI. 1, p. 163 

 (i p.), ,4°, 1880. 



The genesis and conservation of vol- 

 canic energy. [Abstract.] 



Am. Assoc. Adv. Soi., Pioc, vol. 33, pp. 432- 

 438, 1885. 



Finart, A. L. Voyages ii la cflte nord- 

 ouest do I'Am^rique, annees 1870-1872. 

 Vol. 1, part 1. MiniSralogie et geologic. 

 5 pages, 5 plates, 4°, Paris, 1875. [Not 

 seen.] 

 Piatt, Franklin. Report of progress in 

 the -Clearfield and Jefferson district of 

 the bituminous coal fields. 



2d GeoL Surv. PeuDsylvania, Report H, viii, 

 296 pages, maps, plates, Harrisbarg, 1875; (pp. 

 247-296, from H. D. Eogers's final report). 



Durability of the natural gas supply. 



2d (reel. Surv. Pennsylvania, Report L, spe 

 cial report on tlie manufacture of coke, pp. 

 161-172, Harrisburg, 1876. 



The coal measures of the Youghio- 



gheny [and Connellsville]. 



2d Geol. Surv. Pennsylvania, Report L, spe- 

 cial report on coke manufacture, pp. 1-116, 3 

 plates, Harrisburg, 1876. 



[ ] Coal basins of Bradford and Tioga 



counties, and at the forks of Pine 

 Creek, in Potter County. 



2d Geol. Surv. Pennsylvania, Report G, re- 

 port of progress in Bradford and Tioga coun- 

 ties, pp. 97-234, Harrisburg, 1878. 



^ [Report on the coal fields.] 



2d Geol- Surv. Pennsylvania, Report GGG, 

 , the geology of Potter Conjity, by Andrew 

 Sherwood, pp. 67-68, 69-95, Harrisburg, 1880. 



Character of some Sullivan County, 



Pa., coals. 



Am. Phil, Soc, Proc, vol. 18, pp. 186-191, 

 1880. 



The Queens Run coal basin in Clin- 

 ton County, north of the Susquehanna 

 River. 



2d Geol. Surv. Pennsylvania, Report G4, 

 geology of Clinton County, by'H. Martyn 

 Chance, pp. 153-164, Harrisburg, 1880. 



The TangasGOotac coal basin in Cen- 

 ter and Clinton counties south of the 

 Susquehanna. 



2d Geol. Surv. Pennsylvania, Report G4, 

 . geplogy of Clinton County, by H. Martyn 

 Chance, pp. 165-174, Harrisburg 18^. 



The geology of Blair County. 



2d Geoi. Surv. Pennsylvania, Report T, 311 

 pages, with atlas of 14 sheets, colored map, 1 

 index sheet, 2 sheets colored sections, Harris- 

 burg, 1881. 



Piatt, Franklin — Continued. 



How anthracite coal lies in the 



rocks. 



2d Geol. Surv. Pennsylvania, Report A2, 

 special report on waste in mining anthracite, 

 by Franklin Piatt, pp. 1-4, plates, Harrisburg, 

 1881. 



and Piatt, W. G. Report of progress 



in the Cambria and Somerset district of 

 the bituminous coal fields of western 

 Pennsylvania. 



2d Geol. Surv. Pennsylvania, Report HHH, 



348 pages, plates, maps, 8°, Harrisburg, 1877. 



Includes preface by J. P. Lesley, pp. xi-xxxiv. 



Abstract, Am. Jour. Sci., 3d series, vol. 15, 



p. 315 (i p.), 1878. 



Report of progress in the Cam- 

 bria and Somerset district of the bitumi- 

 nous coal fields of western Pennsylva- 

 nia, part 1, Cambria. 



2d Geol. Surv. Pennsylvania, Report HH, 

 XXX, 194 pages, 5 plates, 5 maps, 8°, Harrisburg, 

 1877. 



and Sanders, R. H. Section of 



the Paleozoic rocks in Blair County, 

 Pa. 



Am. Phil. Soc. Proc, vol. 17, pp. 349-352, 714, 

 1878. 



2d Geol. Surv. Pennsylvania, Report F, 

 fossil ore Juniata Valley, by J. H. Dewees, pp. 

 261-264, Harrisburg, 1878. 



Sherwood, Andrew, and. The geol- 

 ogy of Lycoming and Sullivan conn- 

 ties. 



2d Geol. Surv. Pennsylvania, Report of prog- 

 ress GG, ix, 208 pages, 2 maps, plates, Harris- 

 burg, 1880. 



Piatt, W. G. Report of progress in In- 

 diana County. 



2d Geol. Surv. Pennsylvania, Report H4, 

 xxvii, 1-316 pages, map, Harrisburg, 1878. 



Report of progress in Armstrong 



County. 



2d Geol. Surv. Pennsylvania, Report H5 for 

 1879, xxiii-lxvii, 338 pages, map, Harrisburg, 

 1880. 



Report of progress in Jefferson 



County. 



2d Geol. Surv. Pennsylvania, Report H6, 

 xxxiv, 218 pages, map, Harrisburg, 1881. 



Piatt, Franklin, and. Report of 



progress in the Cambria and Somerset 

 district of the bituminous coal fields 

 of western Pennsylvania, part 1, Cam- 

 bria. 



2d Geol. Surv. Pennsylvania, Report HH, 

 XXX, 194 pages, 5 plates, 5 maps, Harrisburg, 

 1877. 



