12 LIFE ON THE FARM. - 



Men who have made a careful study of rain say 

 that these fine dust particles in the air have the 

 power of attracting water vapor. When these little 

 dust particles have gathered a thick film of water 

 around themselves, they become so heavy that they 

 can no longer float, and so fall to the earth as 



SOIL-BUILDING IN THE SWAMP. 



drops of rain. They grow larger and larger as they 

 fall, till, on striking the ground, the surface of a 

 pond, or the leaves of plants, they are no longer 

 fine particles of mist, but drops of water large 

 enough to be seen and felt. 



