WATER METERS 



787 



4_-^ ; ^f 



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Sectional Elevation. 



Plan 

 FIG. 357. Recording Device for Venturi Meter. 



place without undue loss. Where the meter is required to measure the 

 flow in either direction, the angles of convergence and divergence are 

 each made equal to 5 6'. 



The Venturi meter is often used with a registering device giving an 

 automatic record of the velocity or discharge. One form of such a 

 recorder is shown in Fig. 357. Here two float pipes are connected 



H.A. 3 B 



