106 



SEASON 1874-75. 

 A V-SHAPED SPOUT 



was then placed on the first row of stones, and two sluices 

 fitted in the spout, one in the line of the stream discharging the 

 water on a leaf-screen, the other at a considerable angle to be used 

 for washing the filter-screens or any other purpose. Below is a 

 drawing of the spout (Fig. 44). 



Jl. 



FIG. 44 scale 



The dam was then heightened by another course of stones, and 

 clay again placed behind them, the whole being covered with turf 



FIG. 45 scale fa. 



to protect the clay (Fig. 45). This dam has now been built eleven 

 years, and is still water-tight ; it has only once required repair, 

 and that was in the second season, when it was pointed inside 

 below the water-line. 



