154. 



SEASON 1874-75. 



well^the leaf-screen was placed, and the overflow and waste from 

 the screen was led through a short drain back to the stream. A 

 common red 6-inch tile, which was replaced a few months after 

 by a 10-inch, as shown in cut, led from the leaf-screen to the plank 

 pond ; but the duct to the screen was a 10-inch pipe, the surplus 

 water passing over the screen and down the waste. 



FIG. 115 scale ^. 



This screen differs from the usual leaf-screens. It was necessary 

 to waste as little level as possible, and to return the waste water 

 to the burn, above flood level. The 10-inch pipe to the plank 

 ponds was led away from a sluice-box, and the centre of the bottom 

 of the screen-box was sunk to give the extra depth. The sluice 



