| 
50 Major Lachlan on the Rise and Fall of the Lakes. 
ad to it; and which may therefore require @ 
whole season, or even more, to be accomplished. Of the motive 
power of ice, I myself have had ample proof, in the frequent dis- 
lodgment of boulders of large size from one part of the Lake © 
shore to another, near my own farm; but more particularly of a 
vast rugged mass of limestone rock moved from eomparative 
deep water, some distance ont in the Lake, toa more shallow 7 
part, so near the shore, that a large tree, dislodged from the high 
bank above by the undermining fury of the waves, happened to 
fall over in such a manner that its stem formed a very convel- 
jent though giddy bridge, from the beach to the stranger rock, 
and thereby allowed the latter to be afterwards used as a pleasant 
fishing station by my children. There are also, to my own 
knowledge, many instances of the removal of boulders in the 
different parts of the Rapids near Montreal. And among many 
examples of the almost entire temporary obstruction of the out- 
lets of Lakes Huron and Erie by the jamming of the ice, I shall 
append to this paper an account of one which took place in t 
Niagara River, between Buflalo and Fort Erie, in March, 1848, 
with which I was at the time so much struck that I was induced 
to write toa friend on the spot for further particulars, in hopes — 
of elucidating my long-cherishsd hypothesis; and such 1 have 
oubt would have been the case had I been able to be present 
myself to compare facts. Independent of that, however, the 
particulars connected with the obstruction in the Niagara* alluded 
to, were of so extraordinary a character as to deserve being placed 
on permanent record. af, 
* The account of this singular phenomenon is unayoidably postponed till some : 
= 
ae 
future time, 
