HYDROLOGY OF NEW YORK G49 



granted the right to excavate 100 feet down the face of the bank. 

 In 1852, when this contract was made, the use of waterpower 

 under higher heads than 100 feet was, so far as the United States 

 was concerned, entirely unknown. Until recently the mills at 

 Niagara Falls have not attempted to use more than 50 or 60 feet 



Fig. 41. General plan of development of the Niagara Falls Hydraulic 

 Power and Manufacturing Company. 



head; hence it resulted that although the capacity of the Niagara 

 Falls Hydraulic Power and Manufacturing Company's canal, as 

 at first constructed, was sufficient, by development of the whole 

 head, to produce about 15,000 horsepower, under the original 

 agreements its capacity was exhausted when about 7000 horse- 

 power was produced. 



In 1892 the Niagara Falls Hydraulic Power and Manufac- 

 turing Company began an enlargement and improvement of its 



