IRRIGATION — ROUND TABLE 115 



tile are fed back through. But that isn't intended for smaller than 

 six inch tile. That machine would go through a couple of feet of 

 water. It has a caterpillar tread. 



Mr. Work: Will your own machine work on muck satis- 

 factorily.^ 



President White: Our machine wouldn't work on muck. I 

 think it is doubtful whether anything but the caterpillar tread would 

 work. 



OVERHEAD IRiUGATIOX 



Mr. Work: Perhaps we are ready to turn to another phase of 

 irrigation. WTio has used the Skinner system.^ Maybe we had 

 better just say what the Skinner system is. The Skinner system is 

 an overhead system. To equip an acre for the Skinner system you 

 set posts in lines from fifty to sixty feet apart. On top of those posts 

 you place pipes horizontally in such a way that they can be turned. 

 In those pipes are set nozzles. A special machine is used for driUing 

 the holes. You can do it with any drill, but the machine that Ls 

 devised for the purpose has the advantage of enabling you to set the 

 holes in perfect line. At the end of each of these pipe lines, there is 

 a special joint with a strainer in it, and it is so built that it permits 

 the line to be turned, throwing the streams horizontally or at an 

 angle, as desired. A single line can cover a strip fifty feet wide with 

 forty pounds pressure. These nozzles are set three or four feet apart 

 on the pipe line. If your pipe line is. say, three hundred feet long, 

 you would start with one hundred feet of one inch pipe, then one 

 hundred of one and one-half, then one hundred of one and three- 

 quarters. At the greenhouse we have the essential parts of it set 

 up where you can look it over. We have one line that we are using 

 in the greenhouse. The greenhouse nozzle is a little different from 

 the outdoor. Instead of having an opening straight through, the 

 nozzle is notched to give a fan-shaped stream. 



Question: What is the size of that center holer 



Mr. Work: About one thirty-second inch. They are sold for 

 five cents apiece. 



President White: Mr. Ben Titus told me he had them made 

 in Rochester, and they cost him about half that. 



