212 



TRANSACTIONS OF THE 



Eight veins are traced here comprehended within the 

 space of 153 feet of strata ; only two of which have been 

 opened, and a small vein occurs 100 feet higher in the 

 series, making the range of carboniferous deposits 233 

 feet. 



Coal run. — Coal, resembling the foregoing, is here 

 mined on a small scale. 



Specific gravity, 1.371. 



Weight per cubic yard, 1 ton and 1 cwt. 



Weight or produce per acre, 4500 to 5000 tons. 



Thickness worked, somewhat less than 3 feet, but va- 

 rying from 2| to 3| feet. 



The above notes on the quality of these coals were 

 made in 1832, since which little or no progress in mi- 

 ning has been made. 



Here is also a vein called pitch coal, which may be 

 worked with the kidney ore. It is of a very pure and 

 inflammable description, but contains occasional small 

 seams of sulphuret of iron. 



Specific gravity, 1.500. 



Weight per cubic yard, 1 ton and 289 pounds. 



Thickness \\ feet. 



Produce of an acre, 2115 tons. 



The lowest vein in Coal run is of a peculiar character, 

 approaching somewhat to the cannel coal of England. 

 In conchoidal fracture like anthracite, almost as capable 

 of receiving a polish, and burning with intense heat, but 

 distinguished from it by the quantity of bitumen and the 

 brightness of its flame. It is in no way depreciated by 

 long exposure to the atmosphere. The fragments from 

 which the analysis was made were collected from the bed 

 of the run, where they had evidently lain many years. 



Specific gravity of one specimen, 1.716 ; of a purer 

 variety, 1.750. 



Weight per cubic yard, 1 ton and 596 pounds ; of a 



