DEW. 207 



Q. Why is there NO DEW after a WINDY 

 NIGHT ? 



A. 1st Because the wind evaporates 

 the moisture, as fast as it is deposited ; 

 and 



2ndly It disturbs the radiation 

 of heat, and diminishes the deposition of 

 dew thereby. 



Q. Why are VALLEYS & HOLLOWS often thickly 

 covered with DEW, although they are sheltered ? 



A. The surrounding hills prevent the 

 repose of air (in the valleys) from being 

 disturbed; but do not overhang and 

 screen them, so as to arrest their 

 radiation. 



Q. Why does DEW FALL more ABUNDANTLY 

 on SOME THINGS than upon OTHERS ? 



A. Because some things radiate heat 

 more freely than others, and therefore 

 become much cooler in the night. 



Q. Why are things which RADIATE HEAT 

 MOST FREELY, always the most THICKLY COVERED 

 with DEW? 



A. Because the vapour of the air is 

 chilled into dew, the moment it comes in 

 contact with them. 



T2 



