- 373 - 



of the Gap Nickel Mine, map and sections of the East Bank of Susquehanna 

 River; other geological sections across the county, and geological colored 

 maps of York and Lancaster counties. By Persifor Feazer. 8. vo., pp. 350. 



D. Report of Progress in the Brown Hematite ore Ranges of Lehigh 

 County. 1874, with descriptions of mines lying between Emaus, Alburtis, 

 and Foglesville. By Frederic Prime , Jr. 8 vo. , pp. 73, with a contour- 

 line map and 8 cuts. 



DD. The Brown Hematite Deposits of the Siluro-Cambrian Limestones 

 of Lehigh County, lying between Shimersville, Millerstown, Schencksville, 

 Ballietsville , and the Lehigh river. 1875—76. By Frederic Prime, Jr. 

 8 vo., pp. 99, with 5 map-sheets and 5 plates. 



E. Special Report on the Trap Dykes and Azoic Rocks of South- 

 Eastern Pennsylvania. 1875 ; Part I, Historical Introduction. By T. Sterry 

 Hunt. 8 vo., pp. 253. 



F. Report of Progress in the Juniata District on Fossil Iron Ore Beds of 

 Middle Pennsylvania. By John H. Dewees. With a report of the Augh- 

 wick Valley and East Broad Top District. By C. A. Ashburner. 1874—78. 

 Illustrated with 7 Geological maps and 19 sections. 8 vo., pp. 305. 



G. Report of Progress in Bradford and Tioga Counties. 1874—78. 



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



II. Description of the Barclay, Biossburg, Fall Brook, Arnot, Antrim, and 

 Gaines Coal Fields, and at the Forks of Pine Creek in Potter County. By 

 Franklin Platt. III. On the Coking of Bituminous Coal. By John 

 Fulton. Illustrated with 2 colored Geological county maps, 3 page plates 

 and 35 cuts. 8 vo., pp. 271. 



GG. Report of Progress. The Geology of Lycoming and Sullivan 

 Counties. I. Field Notes by Andrew Sherwood. II. Coal Basins, by 

 Franklin Platt. With two colored geological county maps and numerous 

 illustrations. 8 vo., pp. 268. 



GGG. Report of Progress in 1876—79. 8 vo., pp. 120. The Geology 

 of Potter County, bei Andrew Sherwood. Report on the Coal Fields, by 

 Franklin Platt, with a colored geological map of county, and two page 

 plates of sections. 



H. Report of Progress in the Clearfield and Jefferson District of the 

 Bituminous Coal Fields of Western Pennsylvania. 1874. By Franklin 

 Platt. 8 vo., vo. 296, illustrated by 139 cuts, 8 maps and 2 sections. 



HH. Report of Progress in the Cambria and Somerset District of 

 the Bituminous Coal Fields of Western Pennsylvania. 1875. By F. and 

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

 sections. Part I. Cambria. 



HHH. Report of Progress in the Cambria and Somerset District of 

 the Bituminous Coal Fields of Western Pennsylvania. 1876. By F. and 

 W. G. Platt. Pp. 348, illustrated by 110 wood-cuts and 6 maps and sec. 

 tions. Part IL Somerset. 



HHHH. Report of Progress in Indiana County. 1877. By W. G. 

 Platt. Pp. 316 ; with a colored map of the county. 



