RAIN. 337 



vapour being squeezed out, falls to the 

 earth as rain. 



Q. Why are RAIN-DROPS sometimes much 

 LARGER than at OTHER times ? 



A. When the rain-cloud is floating 

 near the earthy the drops are large, because 

 such a cloud is much more dense than one 

 which is more elevated. 



The size of the rain-drop is increased according to 

 the rapidity with which the vapours are condensed. 



Q. Does not WIND sometimes INCREASE the 

 SIZE of rain-drops ? 



A. Yes; by blowing two or more 

 drops into one. 



Q. Why do CLOUDS FALL in RAINY weather ? 



A. 1 st Because the clouds are heavy 

 with abundant vapour : and 



2ndly As the density of the air is 

 diminished, it is less able to buoy the 

 clouds up. 



Q. How do you KNOW that the DENSITY of the 

 air is DIMINISHED in RAINY weather ? 



A. Because the mercury of a barom- 

 eter falls. 



Q. Why is RAiN-trater more FERTILIZING 

 than ruMP-teafcr ? 



Ga 



