DKINK CLEAN WATER 305 



nuisances galore. Into this water sewage from 

 country houses, villages, cities, finds its way. Into 

 this water disease germs from infected localities 

 are sure to come. 



Surface water is therefore always more or less 

 unclean, unsafe. 



On the other hand, Spring water is practically 

 clean, safe. As it falls from the clouds, and sinks 

 down into the earth, it is filtered through strata of 

 sand, gravel, rocks, and is thus made clean. 



Deep Artesian water is filtered the best, and is 

 the cleanest water in the world. 



But water from common springs, when the 

 springs are properly developed, and the surround- 

 ings kept clean, is excellent and safe. 



Typhoid fever and cholera are almost invariably 

 traceable to the use of Surface water. In the same 

 way diphtheria, tuberculosis, and some other dis- 

 eases are often communicated. 



By all means, when possible, drink only Spring 

 water. When not possible, before drinking Sur- 

 face water, boil and thus sterilize it. 



Use not the open well. It is always dangerous. 

 You know not when nor how much pollution may 

 get into it. You may say that you have used the 

 open well for a long time and it has always been 

 safe. But how do you know it has been safe? 

 Have you ever been ill? Any member of your 

 family ill? May not the illness have come from 

 the well? If no harm yet, how long before harm 

 may come? 



