ON BUAINING. 



403 



conductor along the opposite banks, as CD, and com- 

 municating with the main leader by the cross cut E, which 

 must be of sufficient size to carry off the water from CD 

 into AB. The main conductor CD is kept as little below 

 the springs 5, 6, 7, 8, 9, as possible, in order to give the 

 depth to which it is cut proper effect. If tlie bottom of 

 the ditch be porous, the springs will be immediately laid 

 dry ; if otherwise, a short cut communicating with the 

 spring will effectually secure it. 



Fig. III. Represents a springy bog, intended to be 

 drained by Elkington's mode of draining. 



Fig. III. 



Dry porous soil. 



The high dry porous soil receives the water which sub- 

 sides into an open subsoil, and bursts out in the lower 

 gi'ound, in the springs A A, BB, and CCC, through a 



C c 2 



