116 IRRIGATION ROUND TABLE 



Mr. Work: There is nothing complex about them. It is just 

 a little brass plug bored and threaded. You leave it in your line 

 permanently, but you are not using it all the time, and over winter 

 there is danger of rust if the nozzle were of iron. 



Mr. Priest: Have they patents on that system.?^ 



Mr. Work: Yes. I am not posted on the situation regarding 

 the patent rights. I think likely the Skinner people are opposing 

 the making of these devices in local machine shops. It would be 

 worth looking into. Are there any here that have been using the 

 Skinner system? 



Mr. Wrigley: We are using it on market garden crops, last 

 year being the first year we had it. Early it did well. We are on 

 gravelly soil. In the early spring, it saved tomatoes, beans, and so 

 forth, from freezing, and beans did very well under it. We had no 

 trouble with it. I have it in my greenhouse. I got everything at 

 Skinner's, and the bill was only one hundred twenty dollars or so. 



Mr. Work: That does not include pipe, does it.^ 



Mr. Wrigley: No. 



Mr. Work: How far apart are your pipes.^ 

 Mr. Wrigley: Fifty feet. 



Mr. Bonney: I think Mr. Bell uses it at our place. He told us 

 it would cost one hundred fifty dollars an acre for equipment com- 

 plete. 



Mr. Work: The water supply is somewhat a separate question. 

 Did you use it on lettuce, Mr. Wrigley.'^ 



Mr. Wrigley: No, only in the greenhouse. 



Question: Did you reduce your pipes? 



Mr. Wrigley: For seventy feet we used one inch, and for one 

 hundred thirty feet, three-quarters inch. For three hundred feet 

 you would begin with larger pipe. 



Mr. Work: The three-quarter inch is about as small a size as 

 you will want to use. This is for the extreme end, changing to one 

 inch for the second hundred feet, and one and one-quarter for the 

 next hundred feet. 



Question: Does the amount of water pressure, make any 

 difference with the size of pipe? 



