Spencer — Another Episode in the History of Niagara. 441 



where actual surveys could not be effected. Recognizing that 

 the peculiar feature of the gorge at the Whirlpool Rapids 



immediately above Foster's flats at 100 feet, while the rapids in front of Foster's 

 flats are reduced to 35 feet, and then the channel increases to 70 feet before pass- 

 ing out of the canon section. 



