190 Proceedings of the Royal Physical Society-. 



shire. They are all situated in the wild and beautiful part 

 of the Highlands drained by the Tay and its tributaries, and 

 in describing them we shall begin with the highest — Tyn- 

 drum — and take the others in order as we descend the valley. 

 A list of the various metallic and non-metallic minerals from 

 each locality will be given along with some account of the 

 history of the mines, while special reference will be made to 

 the geological structure of the ground. A general comparison 

 will also be drawn between the features of these and other 

 ore deposits, and notes will be made on the facts bearing on 

 their formation. 



Short notices of the mines at Tyndrum are given in the 

 Old and IN'ew Statistical Accounts of Scotland, but the first 

 paper of any value was written by F. Odernheimer, and is 

 published in Vol. VII. of the Highland Society's Transactions 

 (1841) under the title " The Mines and Minerals of the 

 Breadalbane Highlands." The author gives a description of 

 the mines at Tyndrum, Tomnadashan, and Corrie Bui, with 

 their ores and accessory minerals, and indicates the position 

 of several small untried veins around Taymouth. 



Gustavus Thost, who was the last manager, gives a more 

 extensive account of the mines and minerals of Breadalbane 

 in a paper communicated in 1860 to the Geological Society 

 of London.^ His description of the geological structure of 

 the various localities is, however, rather vague, and we hope 

 now to throw a little new light on the subject, as we have 

 worked out the geology of the region in some detail. To add 

 perspicuity to the text we have constructed geological maps 

 and horizontal sections of the two principal areas under 

 notice. Our best thanks are due to Mr James Bett, factor to 

 Lord Breadalbane, who has kindly allowed us access to plans 

 and papers relating to the mines kept in the Estate Office. 



I. — Lead Mines of Tyndrum. 



1. Geological Structure of Ground.— The district we are 

 about to notice embraces the head of Strath Fill an and 

 the ground on the north side of the Coninish valley. It 



^ Proceedings, vol. xvi., p. 421. 



