HEALTH AND WELL-BEING 



27 



gained by reason of such knowledge? What results are 

 sought in a widespread enlightenment of people in matters of 

 health? How many people have need of such knowledge? 

 Why is it an even greater need than a knowledge of how to 

 cure illness? 



THE WATER SUPPLY AND HEALTH 



1. Account for the supply of water (a) in shallow wells ; 

 (b) in very deep ones. How is the caving in of dug wells 

 commonly prevented? How is surface water to be kept 

 from running into such wells ? Why should there be a tight- 

 fitting cover over the well? 



2. Describe the general character of the upper layers of 

 the earth's crust that makes possible an ample water supply 



FIG. 13. Conditions for wells. 



when pipes are driven through them. Illustrate by diagram 

 the conditions that make artesian wells possible. How is 

 the heat of certain springs and of geysers accounted for? 



3. Discuss the necessity for care in locating wells near 

 dwellings and outbuildings. What element of danger is 

 there from cesspools, drains, and leaky sewers even when 



