2 10 RECAPITULATION. \cu\r. xr. 



tlicir progress in the boats would be checked by the innumerable 

 floating icebergs, some small and some great ; and this would have 

 occurred on our twenty-second of June, and where the Lake of 

 Geneva is now spread out ! * 



* In the former edition and Appendix, I have given some facts on the 

 transportal of erratic boulders and icebergs in the Antarctic Ocean. This 

 subject has lately been treated excellently by Mr. Hayes, in the Boston 

 Journal (vol. iv. p. 426). The author does not appear aware of a case 

 published by me (Geographical Journal, vol. ix. p. 528) of a gigantic 

 boulder embedded in an iceberg in the Antarctic Ocean, almost certainly 

 one hundred miles distant from any land, and perhaps much more distant. 

 In the Appendix I have discussed at length the probability (at that time 

 hardly thought of) of icebergs, when stranded, grooving and polishing 

 rocks, like glaciers. This is now a very commonly received opinion ; and 

 I cannot still avoid the suspicion that it is applicable even to such cases 

 as that of the Jura. Dr. Richardson has assured me that the icebergs oft' 

 North America push before them pebbles and sand, and leave the sub- 

 marine rocky flats quite bare : it is hardly possible to doubt that such 

 ledges must be polished and scored in the direction of the set of the pre- 

 vailing currents. Since writing that Appendix, I havo seen in North 

 Wales (London Phil. Mag., vol. xxi. p. 180) the adjoining action of 

 glaciers and of floating icebergs. 



