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Changes wrought within these Limits subsequent to the burst- 

 ing f tht Barrier, and in consequence thereof. 



After the subsidence and removal of the briny waters 

 through so many passages, the streams fed by the rains 

 and springs retiring to their channels, seem to have 

 wrought other alterations, a few of which deserve to be 

 mentioned. Travelling down the inclined plane from 

 their several sources to the new level of the lakes, they 

 have given a configuration of a more recent and modern 

 date to the regions through which they pass. 



Among these are 



The falls and rapids in the Black river. 



The falls and rapid* in the Onondago river, a few 

 miles above Oswego. 



The fall in Salmon river. 



The rapids in the Seneca river, near the outlet of the 

 Seneca lake and at Jack's rift below. 



The cataract in the Genesee river. 



The grand cataract in Niagara river, which, from its 

 just celebrity and grandeur, merits a more particular de- 

 scription. There is reason to believe it deepened its 

 channel through the rocks between Chippeway and 

 Schlosser, and by that operation contributed further to 

 lower the level of lakes Erie, Huron and Michigan. 



The cataract has employed so many pens and pencils, 



