Whirlpool and Rapids below the Falls of Niagara. 
of the grounds. The ques- 
tion naturally arises, how is 
it possible for this immense 
volume of water to escape 
efile, 
comparatively sluggish in the 
whirlpool. On referring to 
Mr. Lyell’s admirable work on 
America which I had with me, 
and examining the section of 
the strata from Niagara to the 
Mr. L. had 
ting rock under the water is un- 
through, and the resistless tor- 
rent has made itself a passage 
underneath this rock, on each 
side of the ravine, and it is by 
this excavation that the waters 
hardness of the rocks which 
Compose the Niagara group: 
d 
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