166 Mr. Dunn on the Edge Seams of Mid-Lothian. 



Fathoms, 

 asunder. 



Brought forward, 463^ 



North-Western Division. 



1. From Great Gilhespie to Little Gilliespie, 30 



2. Further to Corby Craig 6 



3. Ditto to Stenkie Coal, 12i 



4. Ditto to Little Splint, 4 



5. Ditto to Peacock Tail, lOi 



6. Ditto to Real Corby, 14^ 



7. Ditto to Carlton, 59 



8. Ditto to Blue Coal, 8 



9. Ditto to Diamond Coal, 59 



10, Ditto to North Green Seam 57 



Total 724 



Thickness. 

 Ft. In. 



58 4 



2 



7 



5 







2 



10 



3 







4 



3 



4 



6 



4 



10 



2 



6 



2 



7 



4 



3 



94 



8 



The easternmost of these seams at the outcrop are the most upright, 

 and may be seen in the neighbourhood of Mr. Wauchope's House, at 

 Edmondstone nearly perpendicular. The lower seams so progressively 

 diverge from the perpendicular (see the accompanying profile) that the 

 North Green, or Lowest Seam, worked at the out-crop, lies at an angle 

 of 30° with the horizon. 



The out-cropping of the Edge Seams, according to the undulation of 

 the surface, occupies a space from south-east to north-west of 1 000 or 

 1500 yards, 



I cannot make out that ever the flat Coals of Edmondstone and Sheriff 

 Hall were pursued to a junction or continuation of the Edge Seams, and, 

 were the prevailing opinion of the Coal Managers of the district, and the 

 section of the sinkings of the above mentioned Collieries to be taken as 

 evidence, they are 7iot continuous ; the easternmost of the Edge Coals ne- 

 ver yet having been sunk to in the valley approaching the North Esk, 

 the following account of which will enable a judgment to be formed.* 



* Mr. Bald, in a communication to the Royal Society of Edinburgh, calculates that, in 

 the lowest part of the basin, the undermost Coal would be 500 fathoms deep. 



