IRRIGATIOX. 



Figure 4, on the following page, 

 represents a plan of irrigation where 

 the soil is very porous and gently 

 inclined, the supply of water being 

 abundant. The flood-gate, a, which 

 may be replaced by the perforated 

 trunk of a tree, allows water to flow 

 into the upper straight ditch, b, b, 

 which is well puddled ; from this the 

 water descends into the channels, c. 



; c, c, which run down hill ; they are 

 stopped at intervals with small banks 



, of clay or turf, which cause a portion 



I of the fluid to shoot out over the land 

 and moisten the field. There is no 



[ catch-work necessary, as the excess 



j of water percolates into the soil. 



! The inundation practised in Carolina 

 and elsewhere, for the cultivation of 



■ rice, is warping, and can hardly be 



