IRRIGATION FARMING. 



ized, by gearing and belts, in doing a great amount of 

 work, such as churning, grinding, etc. One man can 

 attend to the whole outfit, and if the water-lifting 



FIG. 83. THE PNEUMATIC SYSTEM. 



arrangement is not as yet wholly complete, Yankee 

 ingenuity will soon make it so, as the principle is all 

 right. 



Repairs of Windmills. At least once a year a 

 windmill pumping plant should be overhauled and put 

 in repair. First the pump should be repacked, if the 

 valves leak. The check valve must be absolutely water- 

 tight. Not a particle of water must run through when 

 the valve is shut. If it does the pump pipe will become 

 empty and the water will not start for a time, nor will it 

 start at all without priming if the check valve is above the 

 water level in the well. The piston valve must be renewed 

 when worn, otherwise but part of the water is raised 

 with the stroke, and when the wind is light tlu wind- 

 mill will run without raising :ny water; this would bo 

 dangerous, for at a certain speed the mill will pump just 

 fast enough to freeze water in tlu- pump, wht-n an iiu-r. 



