96 



FARM MECHANICS 



This imprisoned air compresses after each kick and ex 

 pands between kicks in a manner intended to force a 

 more or less steady flow of water through the small 

 pipe. The air pressure is maintained by means of a 

 small valve that permits a little air to suck in with the 

 supply of water. 



Figure 112. Hydraulic Ram. The upper drawing shows how to 

 install the ram. The lower drawing is a detail section through the 

 center of the ram. Water flows downhill through the supply pipe. 

 The intermittent action of the valve forces a portion of the water 

 through another valve into the air-chamber. Air pressure forces 

 this water out through delivery pipe. Another valve spills the waste 

 water over into the tailrace. An automatic air-valve intermittently 

 admits air into the air-chamber. 



Water may be conveyed uphill to the house by this 

 means, sometimes to considerable distance. The size 

 of the ram and its power to lift water depends upon 

 the amount of water at the spring and the number of 

 feet of fall. In laying the small pipe, it should be 

 placed well down under ground to keep it cool in sum- 

 mer and to bury it beyond the reach of winter frost. 

 At the upper end where the water is delivered a stor- 



