E 3*9 J 



PART III 



STRONTI AN AND BEN-NEVIS, 

 (Read loth March 1810.J 



In relating the progress of the mineralogical tour 

 through the Highlands of Scotland, which I have 

 had the honour of describing to this Society, my 

 last paper brought us on, to the clay-slate forma- 

 tion of Balahelish. 



On the opposite or north side of Loch-Leven, 

 the same substance, first alternating with, and 

 then passing into, mica-slate, may be distinguish- 

 ed by its usual characteristic features, in the shape 

 of the hills which skirt Loch-Linnhe, on the 

 right hand of the road to Fort- William. In pas- 

 sing along this road, yellowish- white granular 

 quartz, in beds or masses of great size, repeatedly 

 presents itself. The first remarkable instance 

 occurs at a small distance from the ferry, to the 

 west of a hollow on the face of the rising ground, 

 where the rock appears to have been worked for slate. 

 Farther on, granular limestone of a bluish-grey 



