1881.] 



345 



fAshburner. 



north-east of St. Mary's. Average thickness of coal 2 feet 6 inches. Coal, 

 dull black, more or less coated with iron oxide ; partings of pyrites in very 

 minute crystals partly decomposed. 



Z». East mine, St. Mary's Coal Company. Average thickness of coal 3 

 feet 2 inches. Coal, dull black, brittle, iridescent, numerous partings of 

 pyrites and slaty coal. 



c. West mine, St. Mary's Coal Company. Average thickness of coal 

 3 feet. Coal, dull black, more or less stained with iron oxide, rather friable 

 and contains numerous partings of pyrites and slaty coal. 



d. Cascade mine, Kaul and Hall. Average thickness of coal 3' 8". 

 Coal, deep black, lustrous and coated with silt ; contains considerable 



pyrites, which is partially decomposed. 



For the sake of comparison I have added the analyses of the Roberts lot 

 coal and the coal of the North-Western Mining and Exchange Company at 

 Centerville, and of the Clermont, Clarion bed on the Monastery lands : 



gray 



Color of ash yellow, pink tint, cream. 



Coke per cent 59.550 60.465 61.240 



Fuel ratio 1 : 1.39 1 : 1.38 1 : 1.39 



e. Hoyt opening on "gas vein" Roberts' lot, Jones township. Coal 

 has a dull black luster ; cannelly structure ; laminae indistinct ; fracture 

 generally irregular, but with a tendency to a cubical. 



/. "Cmine" North-Western Mining and Exchange Company. Aver- 

 age thickness of coal 3 feet 6 inches. Coal, deep black, lustrous, brittle ; 

 shows numerous thin partings of pyrites in minute crystals, partially de- 

 composed. 



g. Silver creek mine on Clermont bed. Monastery lands, D. Eldridge 

 operator. Average thickness of coal 2 feet. Coal, deep black, lustrous, 

 brittle, no crystals of pyrites observed. By a comparison of these analyses 

 it will be found that greater differences exist in the composition of the bed 

 in the immediate vicinity of St. Mary's, than between the coal at Tanner- 

 dale, Centerville and Roberts' lot, or between the coal from the bed at any 

 one of these three places, and that taken from the Silver creek mine on the 

 Monastery lands. 



There is no characteristic belonging to the Kittaning Lower coal bed, 

 which may serve as a means for its identification. Where the greatest 

 differences in the composition of the bed exist, as at St. Mary's, the coal 

 can be easily traced and located in the series, by observations made on the 



