754 



NEW YORK STATE MUSEUM 



that this leakage, which is practically all below the falls, is a 

 detriment to their waterpower which ought not to exist. In 

 order to determine the amount of this leakage, as well as the 

 relation which it bears to the question of a material increase in 

 the flow of the Hudson river by storage, a series of measurements 

 of the flow of the feeder was undertaken early in October, 1895. 



Arrangements having been made with the division superin- 

 tendent to maintain a uniform feed for several days before the 

 measurements began, as well as during the days when they were 

 actually being made, and points established for verifying the 

 uniformity of the flow during the time of the measurements, a 

 series of accurate sections was then made at points both above 

 and below the leakage, and a large number of current-meter 

 readings taken from a footbridge thrown temporarily across the 

 feeder at each section. The results so obtained are as follows: 



1) On October 8, 1895, the flow in the feeder just below the 

 guard lock at the feeder dam, above all serious leaks, was 383 

 cubic feet per second. 



2) On the same day the flow at change bridge No. 13, about 

 one-half mile from the feeder dam, above all serious leaks, was 

 364 cubic feet per second. 



3) On October 9 and 10 the flow a short distance below all 

 serious leaks was 213 cubic feet per second. 



4) On October 10 the flow about half a mile farther down was 

 191 cubic feet per second. 



5) On October 11 the flow just above the locks at Sandy Hill 

 was 182 cubic feet per second. 



6) A section, also taken October 11, in the Champlain canal, a 

 short distance north of where the feeder enters, shows that the 

 amount of water passing to the north at that time was 74 cubic 

 feet per second. 



These measurements show that the loss between sections 1 

 and 5, which may be taken as including about all the losses from 

 the feeder, is 201 cubic feet per second. The water delivered 

 into the Champlain canal is therefore only about 47 per cent of the 

 quantity entering the feeder at the guard lock. The measure- 

 ments also show that of the 182 cubic feet per second actually 

 delivered to the Champlain canal 74 cubic feet per second is 



