125 



Spean. Ho adduced several considerations to shew that the blockage 

 at the west end of Glen Roy could have been nothing else than de- 

 tritus capable of being worn down and removed by the gradual ope- 

 ration of a stream, and in this manner bo accounted for the ultimate 

 removal of all the blockage which had previously dammed back the 

 water in the several valleys marked by shelves. 



He next adverted to the theory of Agassiz, that the waters had 

 been blocked up by the moraine of a glacier descending from Ben 

 Nevis ; — a theory which, at the best, could not explain the formation 

 of a lake in Glen Gluoy. The author shewed, however, that it would 

 not explain the shelves in Glen Roy ; as the two uppermost shei^es, 

 stopped short by two miles of the place where the Ben Nevis moraine 

 is said to have been formed, and the lowest shelf went beyond this 

 place by three or four miles. 



The following Gentleman was duly elected an Ordinary 

 Fellow : — 



James Nicol, Esq. 



The following Donations to the Library were announced : — 



Medico-Chirurgical Transactions published by the Royal Medical 



and Chirurgical Society of London. Vol. XXIX. — By the 



Society. 

 Memoirs of the Wernerian Natural History Society, for the years 



1837-8. Vol. VIII., Part l.—By the Society. 

 The Journal of Agriculture, and the Transactions of the Highland 



and Agricultural Society of Scotland. — By the Society, 

 Five Geological Memoirs, viz. — 



Geological Features of the Mines of Taurus. 



On the Gogofan Mine, Csermarthenshire. 



On the Mining Establishment of France. 



On Coal and Lignite, and on Iron and Steel manufactured in 

 France. 



On the Mining Academies of Saxony and Hungary. By War- 

 ington W. Smyth, Esq. — By the Author, 



