250 



HYD1UULICS AND ITS APPLICATIONS 



Cock in Cylindrical Pipe (Fig. 112 a). Here a = area of section through 

 valve : A = area of pipe : = angle through which valve is turned. 



Throttle Valve in Cylindrical Pipe (Fig. 112 &). These experiments 



<D 



FIG. 112. 



were carried out on pipes and valves of slightly under 2 inches 

 diameter. 

 Experiments on a gate valve for a 24-inch pipe 1 gave values of F as 



Kuichling, " Transactions American Society Civil Engineers, 7 ' 1892, vol. 26. 



