794 



HYDEAULICS AND ITS APPLICATIONS 



Guided back by this pocket it enters a second moving pocket with 

 increased velocity, is thrown outwards and projected forwards with 

 still greater velocity into a second stationary pocket, and so on. Theo- 



Water Outlet: 



FIG. 399. Reynolds' Hydraulic Dynamometer. 



retically, but for the effect of friction, eddy losses, and the introduction of 

 fresh water, this velocity would increase indefinitely. To produce the 

 change in the moment of momentum about the shaft which occurs at 

 each reversal of each stream, an equal moment must be applied to the 



