222 



SEASON 1876-77. 



made in the side of the dividing-box for waste water. This 

 opening was fitted with a subsidiary box, in which two grooves 



Fio. 153 scale &. 



were cut, and from which a 15 -inch sanitary spigot and faucet 

 glazed pipe led to the stream (Fig. 153). In these grooves pieces 

 of flooring were slipped, and the space between filled up with clay, 

 thus making an absolutely tight valve ; and as the surfaces of the 

 clay are protected on both sides the valve remains tight for years. 

 A smaU groove was also cut in the sides of the dividing-box for a 

 few inches in the centre of the second compartment, and a piece 

 of 1^-inch wood slipped in while the dividing-box was in con- 

 struction. This served to turn the current of the water upwards, 

 so that it struck the second board which formed the limit of the 

 second compartment. This board is called the dead-water board, 

 and its duty is to receive any currents that may set up, from one 



Fio. 154 scale 



spout or supply being stronger than the others. The next com- 

 partment thus received the water almost dead, rising evenly 

 upwards from below the dead-water board (Fig. 154). This compart 



