METHODS OF APPLYING WATER. 205 



the water will flow over them easily and safely. They 

 also construdl their lateral ditches very well, and when 

 they are through with the water the supply is turned 

 off. They never waste it. They have only a few 

 small reservoirs. 



In Australia much of the interior land is irrigated 

 mostly through the medium of billabongs or lagoons 

 that are oftentimes supplied from natural streams dur- 

 ing the rainy season. The water is applied to the 

 lands much the same as we apply it. In other coun- 

 tries along seashores a system known as warping is 

 customary. By this mode the tides are received 

 through an embankment or dike and retained until 

 the sediment or warp is deposited. Subirrigation is a 

 system that is pra(5liced in all countries, including our 

 own, and as it is of much importance as to detail the 

 writer will treat it in a special chapter later on. 



