90 WATER 



the east and west directions? Is there any difference 

 between being level and being horizontal? 



b. Half fill the little bottle with water and lay it 

 upon its side on a board. When the surface of the water 

 is the same distance. up from the side of the bottle, all 

 along, the board is horizontal in the direction of the 

 length of the bottle. How can you make a board level by 



. means of the bottle? 

 The bottle is called a 

 level. A simple level 

 is shown in the illustra- 

 tion. In this level the 

 tube is curved so that the air bubble is always at the 

 highest part. 



A block of wood, or a stone, will stay where you put 

 it; water will run off. All liquids act in the same manner 

 and are said to flow. If the water faucet is gradually 

 shut so that the flow of water becomes less and less, the 

 stream will suddenly break into drops. How would a 

 rainstorm be if water did not break into drops? Water- 

 drops are all the same size unless the drops come together. 

 Do raindrops ever come together? 



On account of the flowing of water there is a saying, 

 "Water always seeks its own level." This means that 

 the surface of water is at the same level everywhere if 

 the water can flow freely between all parts. 



Experiment 44. *Water Seeks its own Level. Size- 

 of Drops. 

 * It is desirable to take Sec. 58 before performing this experiment. 



