8 



Common Science 



FIG. i. The water in the tube rises to the level of the water in the funnel. 



Why water flows up into your house. It is because 

 water seeks its own level that it comes up through the 

 pipes in your house. Usually the water for a city is 

 pumped into a reservoir that is as high as the highest 

 house in the city. When it flows down from the reser- 

 voir, it tends to rise in any pipe through which it flows, 

 to the height at which the water in the reservoir stands. 

 If a house is higher than the surface of the water in 

 the reservoir, of course that house will get no running 

 water. 



