Irrigation Experience 



111 



valve and riser. The water was delivered from the risers into 

 distributing troughs. These are an important part of the outfit. 

 They are V troughs, made of rough lumber, 12 feet long. For 

 the larger troughs a 12-inch and a 10-inch board are used and 

 nailed together at right angles, and cleats nailed across the top 

 every 4 feet. As the water decreases in its onward flow smaller 

 troughs may be used, made of an 8- and a 10-inch board. The 

 end of one trough sets inside that of the next, and is supported 



Fig. 39. Method of distributing water. 



by stakes driven slanting into the ground and across each other. 

 An iron pin placed in auger holes, bored in the stakes, serves to 

 fasten them together. A cross-tie should be placed across the 

 bottom to prevent the stakes from settling as the ground be- 

 comes wet. The water flows from the trough through auger 

 holes on one side, over each of which is attached a device for 

 regulating the flow of water. It is made of galvanized iron and 

 consists of two pieces. There is a hole in one piece correspond- 

 ing in size to the auger hole in the trough. A slide is held in 

 place by the side edges of the first piece, which are bent over. 



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