Reference to the Supply of Large 1 owns. 323 



Thus generally, we shall find that the more we depend 

 upon artificial processes and the greater the variance be- 

 tween our plans of leading and storing water, and those 

 that we find in nature all about us, the greater will be the 

 amount of impurity that poisons it for use. 



On every side of us all the illustrations of how it may 

 be kept in large or small amounts, from the rain drop to 

 the largest lake, from the rill to the river. All is arranged 

 in the great laboratory of nature that it may be kept in 

 purity, and when we follow the plans there indicated it 

 will be so kept for us. 



