Vol. 65.] GLACIAL .EROSION IX NORTH WALES. 313 



large scale, while the glacial features in the mountains of North 

 Wales are conveniently small and yet in every way typical. From 

 Cwellyn Lake as a centre, nearly all the localities here described 

 may be easily visited in four or five days. 



It would be easy in describing the Welsh glacial features to 

 adduce many similar features from other parts of the world, but it 

 has seemed less important to multiply instances than clearly to set 

 forth the discussion of this typical locality. The recent literature 

 of glacial erosion may be consulted by those who wish to learn the 

 degree of consistency with which glaciated mountains all over 

 the world exhibit systematically associated abnormal forms. 



XXV. Closing Suggestions. 



Questions that have been much debated frequently leave the 

 debaters divided into opposite parties, the members of each party 

 remaining firm and contented in their own views. Conversion of 

 opinion by further discussion is rarely accomplished. Eecognizing 

 this, the present essay is not particularly addressed to those who, 

 either as glacial-erosionists or as anti-glacial-erosionists, have 

 reached opinions definitely satisfactory to themselves by means of 

 original investigation in appropriate fields ; for the members of one 

 of these parties would perhaps be tempted to say : ' Why elaborate 

 so largely a matter that is almost self evident ?/ and the members 

 of the other party might perhaps say : ' How can any solid 

 foundation for opinion be found by a method that is avowedly so 

 full of theory?' The present essay is therefore addressed to those 

 of a younger generation who have still to form an opinion as to the 

 manner in which glaciated mountains have been sculptured, who 

 wish to examine both sides of the question, and who desire to be 

 self-responsible in forming their opinions. It is hoped that to 

 readers of this class the preceding pages, in which an impartial 

 examination of both theories has been attempted, may prove of 

 some assistance. 



XXVI. Bibliography. 



Citations in the foregoing pages refer by author, date, and page, 

 to the following memoirs : — • 



E. C. Andkews. ' Some Interesting Facts concerning the Glaciation of South- 

 western New Zealand' Trans. Australasian Assoc. Adv. Sci. (Dunedin, 

 1904) 1905, pp. 189-205. 



G. Baeeow. ' The High-level Platforms of Bodmin Moor, & their Relation to 

 the Deposits of Stream-Tin & Wolfram' Quart. Journ. Geol. Soc. vol. lxiv 

 (1908) pp. 384-400. 



H. Gannett. 'Lake Chelan ' Nat. Geogr. Mag. vol. ix (1898) pp. 417-28. 



Sir Aechibaed Geikie. ' On Modern Denudation ' Trans. Geol. Soc. Glasgow, 

 vol. iii (1868-71) pp. 153-90. 



J. B. Hill & D. A. MacAlistee. 'The Geology of Falmouth & Truro, &c.' 

 Mem. Geol. Surv. England & Wales (Expl. of Sheet 352), 1906. 



J. J. Jehtj. ' A Bathymetrical & Geological Study of the Lakes of Snowdonia 

 & Eastern Carnarvonshire' Trans. Roy. Soc. Edin. vol. xl (1902-1905) 

 pp. 419-67. 



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