GENERAL CONCLUSIONS. 295 



is similar, but there was a greater amount of differential 

 elevation as between the mountains and the plains. In 

 the mountainous regions of the west, also, more especially 

 in the interior of British Columbia, the evidence of great 

 local glaciers is much more pronounced than on our lower 

 mountains of the east. 



I shall not attempt to extend these generalizations to 

 the country south of the Canadian border, but must 

 respectfully warn those of my geological friends who 

 insist on portentous accumulations of land-ice in that 

 quarter, that the material cannot be supplied to them 

 from Canada. They must establish gathering-grounds 

 within their own territory. 



Note on Recent Papers. 



While this work was in the press the discussion of 

 questions relating to the glacial period in the United 

 States and Europe has been actively proceeding. Sir 

 Henry Ho worth has treated the subject in an almost 

 exhaustive manner in his work the " Glacial Nightmare," 

 in which his point of view is very nearly that of the 

 present work; though not like this confined to the case of 

 Canada. Many important memoirs have also appeared in 

 American and British periodicals, aud in those of the 

 Continent of Europe. Of these I shall notice only the 

 following, as bearing closely on the scope of the previous 

 pages : 



Prof. Bonney, F.K.S., in a paper read before the Eoyal 

 Geographical Society,* discusses in detail the question of 

 glacial erosion, and arrives at the same conclusion which 

 I stated in 1866, after visiting the Savoy Alps, viz., that 



* "Nature," March 30, 1893. 



