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. Price, $0 48; postage, $0 12.
MISCELLANEOUS REPORTS.
A. Historical Sketch of Geological Explorations in Pennsylvania and other states. By J. P. Lesley. With appendix, containing Annual Reports for 1874 and 1875; pp. pp. 226, 8vo. Price in paper,$0 25; postage, $0 06.
B. Preliminary Report on the Mineralogy of Pennsylvania—1874. By Dr. F. A. Genth. With Appendix on the hydro-carbon compounds, by Samuel P. Sadtler. 8vo., pp. 206, with map of the State for reference to counties. Price in paper, $0 50 ; postage,$0 08. Price in cloth, $0 75; postage, $0 10.
L. 1875—Special report on the Coke Manfacture of the Youghigheny River Valley in Fayette and Westmoreland Counties, with Geological Notes of the Coal and Iorn Ore Beds, from Surveys, by Charles A. Young; by Franklin Platt. To which are appended: I. A Report on Methods of Coking, by John Fulton. II. A Report on the use of Natural Gas in the Iorn Manufacture, by John B. Pearse, Franklin Platt, and Professor Sadtler. Pp.252. Price,$1 00; postage,$0 13.
M. Report of Progress in the Laboratory of the Survey at Harrisburg—1874-5. By Andrew S.McCreath. 8.vo., pp. 105. Price in paper, $0 50: postage, $0 05.
M2. Second Report of Progress in the Laboratory of the Survey, at Harrisburg, by Andrew S. McCreath—1876-8, including I. Classification of Coals, by Persifor Frazer. II. Firebrick Tests, by Franklin Platt. III. Notes on Dolomite Limestones, by J. P. Lesley. IV. Utilization of Anthracite Slack, by Franklin Platt. V. Determination of Carbon in Iron or Steel, by A. S. McCreath. With 3 indexes, plate, and 4 page plates. Pp. 438. Price in cloth, $0 65 ;postage, $0 18.
M3. Third Report of Progress in the Laboratory of the Survey, at Harrisburg. Analyses, &c., &c. By Andrew S. McCreath. Pp. 126, with 2 indexes and map. Price, $0 40; postage, $0 10.
N. Report of Progress—1875–6–7. Two Hundred Tables of Elevation above Tide-Level of the Railroad Stations, Summits and Tunnels ; Canal Locks and Dams, River Riffles, &c., in and around Pennsylvania; with map: pp.279. By Charles Allen. Price, $0 70 ;postage, $0 15.
O. Catalogue of the Geological Museum.—1874–5–6–7. By Charles E. Hall. Part I. Collection of Rock Specimens. Nos.1to 4,264. Pp.217. Price, $0 40; postage, $0 10.
O2. Catalogue of the Geological Museum. By Charles E. Hall. Part II. 1. Collections of rock specimens, Nos. 4265 to 8974. 2. Palæontological specimens. Price, $0 40; postage, $0 12.
P. 1879—Report and Atlas of the Coal Flora of Pennsylvania and of the Carboniferous Formation throughout the United States. By Leo Lesquereux. Price of Report,$0 80 ; postage, $0 28. Price of Atlas, $ 3 35; postage $0 22.
P2. The Permian or Upper Carboniferous Flora of West Virgina and S.W, Pennsylvania, with 38 plates. By Wm. F. Fontaine , M. A., and I. C. White, A. M. Price,$2 25; postage, $0 17.
Other Reports of the Survey are in the hands of the State Printer, and will soon be published.
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