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Allegheny analysis anthracite anticlinal Bald Eagle mountain belt Birch creek Black slate bottom Bradford county Catskill Catskill group centre line clay slate Clinton coal basin coal bed coal measures coke Color of ash Conglomerate of XII corner county line crest crosses Eagle mountain east exposures feet of red feet thick Fireclay Fixed carbon fork Forksville Formation fossil geological gray sandstone Interval concealed iron Laporte layers limestone Little Pine creek lower bench Loyalsock creek Lycoming county Lycoming creek massive sandstone Mauch Chunk McCreath McHenry township Mclntyre Coal mile north mines mouth Muncy creek opened outcrop pebbles Pennsylvania Pine township Pocono Pottsville Conglomerate quarry Ralston red rocks Red run red shale reddish road Rock run rocks are exposed sandstone shale shaly rock Shinersville Short Mountain side southwest specimen Sullivan county Sulphur Susquehanna river synclinal synclinal axis thin bedded Tioga Tomb's run township Volatile matter Williamsport
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. JOHN M. STINSON— Aid in the Laboratory. CE HALL— Geologist in charge of the Survey of Delaware county, and Palaeontologist in charge of the Museum.
Page 239 - The coal does not coke, and the gases burn with a very feebly luminous flame. The coal, after being dried, begins to absorb water rapidly, and in two hours has re-absorbed sixty per cent. of the water originally present. This amount is not increased by longer exposure.
Page 239 - " 245° " " same. '• "200° " ". 4.19^ " 340° " " 4.50% "460° " " 4.69 % At a dull red heat the Coal loses 12.59 % But in all these experiments the water re-absorbed is about the same ; that is, the coal re-absorbs 2.48 parts of water. Irrespective, therefore, of the amount of water, &c., driven off by heat, the portion re-absorbed is practically constant ; and this property is not destroyed, even aller all the volatile matter is driven off.