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acid Alumina analyses anthracite bank Beaver county Bituminous Blair county brick bright crystalline coal brittle calcite Cambria county Carbonate of lime Carbonate of magnesia carries considerable cellular cent clay Clearfield coal bed Coal bright Coal compact Coke Color of ash conchoidal fracture dark brown Dark grey deep black Fayette county feet thick Fixed carbon Freeport Upper Coal Fuel ratio Greene county hard and compact hard and tough Hematite HHHH Huntingdon county Indiana county Insoluble residue iron pyrites irregular fracture Johnstown Kittanning Limestone Lower bench Magnesia manganese McCreath miles east miles north-east miles south miles south-west miles west mineral charcoal Muck-bar pearl grey Pennsylvania Phosphorus Piatt Pittsburgh bed Pittsburgh coal quarry quartz reddish brown reddish grey Report of Progress river Sesquioxide Sesquioxide of iron shale slate Somerset county specimen Sulphur tender three miles Tioga county township trace Upper bench Valley Volatile matter Washington county Water Waynesburg Westmoreland county
Page 438 - By F. and WG Platt. Pp. 194, illustrated with 84 wood-cuts and 4 maps and sections. Part I. Cambria. Price, $1 00 ; postage, $0 12.
Page 439 - 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.
Page 438 - E. SPECIAL REPORT ON THE TRAP DYKES AND Azoic ROCKS OF SOUTHEASTERN PENNSYLVANIA — 1875. Part I, Historical Introduction. By T. Sterry Hunt. 8 vo., pp. 253. Price, $0 48 ; postage, $0 12.
Page 438 - H. REPORT OF PROGRESS IN THE CLEARFIELD AND JEFFERSON DISTRICT OF THE BITUMINOUS COAL FIELDS of Western Pennsylvania — 1874. By Franklin Platt. 8vo., pp.
Page 438 - REPORT OF PROGRESS IN THE CAMBRIA AND SOMERSET DISTRICT OF THE BITUMINOUS COAL FIELDS of Western Pennsylvania — 1875.
Page iv - FA GENTH — Mineralogist and Chemist at Philadelphia. FA GENTH, Jr — Aid in the Laboratory. AS McCREATH — Chemist, in charge of the Laboratory of the Survey, 223 Market street, Harrisburg.
Page 437 - PRELIMINARY REPORT OF THE MINERALOGY OF PENNSYLVANIA — 1874. By Dr. FA 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.
Page 281 - The Upper Washington limestone is a fine stratum of such marked characteristics that it cannot be mistaken for any other in the series. In all portions it weathers to an almost snowy whiteness with the slightest tinge of blue. The upper part is quite slaty and is blue on the freshly exposed surface. The middle layers are dark, almost black, and frequently mottled with drab. They are exceedingly brittle, ring sharply when struck, and yield a limestone of superior quality . . . . The top and bottom...
Page 404 - When all the burners are lighted, which usually takes about 30 minutes, they are allowed to burn turned on full for 25 minutes, the tube being at a full red heat all the time. The supply of oxygen is then stopped, the pinch-cock R put on and Q taken off, and a slow stream of air started through the apparatus to drive out the oxygen. This is done by pouring water into the upper bottle F, and allowing it to run into the lower one, in this way forcing the air through the apparatus. The lights are lowered...