GECfLOGICAL SOCIETY OV PENNSYLVANIA. 



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purer variety, 2953 pounds: being 27 per cent hea- 

 vier than the other bituminous coals of this field. 



I have not recognised out of this district a species of 

 bituminous coal that possesses the properties of density 

 and gravity to such a degree. 



In all, nine veins may be traced here, varying in thick- 

 ness from 1 to 3 feet ; and included within the space of 

 144 feet. Only one vein has been explored and put in 

 work. Taking these veins at the thickness exhibited at 

 their respective outcrops, amounting to four yards, as 

 they vary from 1 to 3 feet, and supposing they could all 

 be worked, there would be a gross weight per acre of 

 20,000 tons of coal existing at this locality. Perhaps 

 not more than half this amount could be obtained to ad- 

 vantage here. 



Johnsonhrun. — The ,9p/m/or hard coal of this locality 

 has an imperfect resemblance to the cannel coal, and 

 suffers little change from exposure to the atmosphere. 

 There are three veins here, showing about a foot and a 

 half thickness at the outcrop, and a fourth below them 

 is a three feet vein. No coal has been yet mined, as 

 there is no road up the ravine where it is exposed. 

 This quality is of the kind denominated open burning 

 coal.'^ 



Specific gravity, 1.493. 



Weight of a cubic yard, 1 ton and 255 pounds. 



Gross weight per acre of the 3 feet vein, 5442 tons. 



East creek. — Traces of a similar quality of coal occur 

 here, where seven veins of dilferent sizes and qualities 

 are perceived, but not a single vein has been proved. 



There are indications of coal at as high an elevation 

 as 550 feet above the Tioga river. 



Morrish run. — The only other bed to which I shall 

 particularly advert, was proved, by a vertical section of 

 the vein, in 1832, to be 6 feet 6 inches in the face. 

 During the winter of 1834-5, a drift has been made 



