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TRANSACTIONS OF THE 



Some particulars of these veins are well worth re« 

 cording. 



Commencing with the north eastern part of the coal 

 field we find the coal in two seams, amounting together 

 to from 10 to 17 feet. 



On the north western side are two veins, in Ander- 

 son's or Graham's pits, 30 feet asunder ; the highest 

 being from 6 to 16 feet, the lowest from 4 to 8 feet 

 thick. These seams are said to come together to the 

 north. 



At the River pit on the south side of James river, in 

 some old workings, at the depth of 130 feet, was a 20 

 feet seam., of a quality equal to any in Virginia. This 

 work was suspended on account of the vein being 

 " nipped out'' by the granite. 



Crossing to the east side of the coal field we find some 

 extraordinary sections of this mineral. 



Hill's pit contains three veins of 5, 6 and 25 feet. 



In Mid-Lothian or Woolridge's pit the coal in one 

 seam is worked above 30 feet, and in parts of the same 

 mine is occasionally much thicker. 



In the Maidenhead or Heath's mine I examined a 

 gallery cut in a solid seam of splendid coal not less than 

 25 feet thick. 



The Black Heath coal, which is reputed the finest 

 quality in the district, is 40 feet thick. 



In Mills's three pits the coal varies from almost nothing 

 up to 40 feet, and the whole seam amounts to 60 feet, 

 including some courses of shale. Fig. 5. 



The Creek pit has one bed of 6 feet, separated only 

 by a 6 feet bed of shale and rock from the main bed of 

 coal which is here 48 feet, including 2 feet of shale ; we 

 have here therefore an aggregate of no less than 52 feet 

 feet of clear coal. Fig. 4. 



On account of the great geological interest excited in 

 the development of such vast masses of this valuable 



