WELLS, PUMPS, CISTERXS, FILTERS. 



119 



able, and swing from a waste pipe to the cistern pipe, shown 

 on the left side of figure 143. In dry weather the pipe 



Fig. 144. COMPLETE CISTERN AND FILTER. 



is turned over the waste, and after the rain has fallen for 

 a sufficient time to wash off the roofs and gutters, it is 

 turned into the cistern pipe. The cistern, figure 143 is 

 provided with a soft brick wall laid in cement, through 

 which the water filters, coming out by the pump per- 

 fectly pure, and free from unpleasant odors. Rain water 



Fig. 145. FILTER FOR A BARN CISTERN. 



standing for months in impurities and filth, cannot al- 

 ways be purified by simply soaking through a brick wall, 



