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acuminate Alethopteris apex base basilar bipinnate bolsters borders branches Brgt Brongniart Cannelton Carboniferous Cardiocarpus centimeters broad characters coal beds coal measures connate Cordaites curved Cyclopteris decorticated decurring described diameter dichotomous distant distinct distinctly divisions enlarged epidermis Ferns Figs figured five millimeters flattened flexuous forking once former species fragments Frond fructifications genus Geol Goepp half centimeters long Halonia Hutt inflated inside scars lanceolate lateral veins leaf scars leaflets leaves Lepidodendron Lepidostrobus Lesqx linear lobes lower mamilla marked Mazon Creek medial nerve middle midrib millimeters broad millimeters long narrow nervation Neuropteris oblique oblong obtuse Oeol Ohio oval ovate Paleont Pecopteris pedicel Penn'a pinnae pinnce pinnules Pittston plants point of attachment Prof rachis referable represent rhomboidal ribs right angle round Schimper Schp seen shale Sigillaria slightly smooth specimens Sphenopteris sporanges stem striate strobiles surface thick thin truncate undulate upper vascular scars Veget venation Verst
Page lxx - Parti. The Northern Townships of Butler county. Part II. A special survey made in 1875, along the Beaver and Shenango rivers, in Beaver, Lawrence, and Mercer Counties.
Page lxix - Limestones, by JP Lesley. IV. Utilization of Anthracite Slack, by Franklin Platt. V. Determination of Carbon in Iron or Steel, by AS McCreath. With 3 indexes, plate, and 4 page plates.
Page 689 - Further observations on the Devonian Plants of Maine, Gaspe", and New York.
Page iv - Topographical Assistant, for mapping the Easton-Reading range. FRANKLIN PLATT — Geologist in charge of the Satistical Survey of the Anthracite coal fields, &o.
Page 692 - On the Vegetation of the Carboniferous Period as compared with that of the present day," published in 1848, was an important contribution to the science.
Page lxviii - J, SPECIAL REPORT ON THE PETROLEUM OF PENNSYLVANIA — 1874, its Production, Transportation, Manufacture, and Statistics. By Henry E. Wrigley. To which are added a Map and Profile of a line of levels through Butler, Armstrong, and Clarion Counties, by D. Jones Lucas : and also a Map and Profile of a line of levels along Slippery Rock Creek, by JP Lesley. 8 vo., pp. 122 ; 5 maps and sections, a plate and 5 cuts. Price in paper, $0 75 ; postage, $0 06.
Page lxx - 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 Eastern Ohio. 8 vo., pp.
Page 421 - ... small vascular points. Leaf-scars transversely rhomboidal, marked horizontally by three vascular scars, minutely papillose under the cortex. • The specimens of this genus obtained until now from American coal measures are rare and not well preserved, none of them with leaves. I have therefore copied the above diagnosis from Schimper, (Paleont. veget., II, p. 49,) who has had for examination the splendid materials representing this genus, obtained and partly figured and described by Goldenberg,...