TRANSACTIONS 



OF THB 



GEOLOGICAL SOCIETY, 



I. Sketch of the Mineralogy of Sky, 



By John Mac Culloch, M.D. F.L.S. President of the Geological Society^ 

 Chemist to the Ordnance, and Lecturer on Chemistry at the Royal 

 Military Academy at Woolwich. 



Read January Q, 1815. 



XjL few weeks residence In the island of Sky having enabled me to 

 give a general idea of its geological structure, I shall make no apology 

 for offering this paper, however incomplete, to the Society. Want 

 of further opportunities may perhaps for ever prevent me from 

 rendering it more perfect, as it may equally prevent others from 

 visiting that island. Nor is a district of such magnitude and inter- 

 est, of which the distance is so great, and the inconveniences of 

 climate and ground so considerable, likely soon to offer to others 

 greater facilities than those, which enabled me to draw up this 

 sketch. Should it prove otherwise, my object will at least, in its 

 Vol. hi a 



