in the vicinity of Dalkeith. 119 



taincd, but the chief of these coals are presently working at the 

 collieries of SlierifF-hall and Edmonstone in the middle of the 

 valley, and are well known in the Edinburgh market ; particu- 

 larly the two named the Diamond and the Jewel coals, which 

 are of very superior quality. 



The following is a Section of the Coals in the Edmonstone 

 Colliery district. 



78 2 27 6 



There is a coal said to be much mixed with pyrites, named 

 the Gold Coal, which lies under the jewel coal, but it never has 

 been wrought, nor the strata explored accurately under it. 

 The strata betwixt the upper coal in the Dalkeith section and 

 the pavement of the jewel coal have not yet been ascertained. 



Of the twenty-six coals in the section only two are unwork- 

 able to profit, from their thinness being only six inches thick. 

 The thinnest coal reckoned workable is one of 18 inches thick. 

 Hepce, if the thickness of all the workable coals ascertained in 

 the Dalkeith district be added together, they amount to the un- 

 common thickness of 109 feet 6 inches ; viz. 



Coal in the section, - - 82 



Flat coals ascertained, - - 27 6 



Total, '. 109 6 



