FIRE. 51 



A. During a thaw, the air is filled 

 with vapour ; and, both moves too slowly, 

 and is too much diluted to nourish the fire. 



Q. Why does a FIRE burn so fiercely in 

 WINDY weather ? 



A. In windy weather the air is rapidly 

 changed, and affords plentiful nourish- 

 ment to the fire. 



Q. Why do a pair of BELLOWS get afire up ? 



A. A pair of bellows, (like the wind), 

 drives the air more rapidly to the fire; 

 and the plentiful supply of oxygen soon 

 makes the fire burn intensely. 



Q. Why is a CANDLE BLOWN OUT by the 

 breath, and not made more intense, like afire ? 



A. As the flame of a candle is con- 

 fined to a very small wick, it is severed 

 from it by the breath; and (being 

 unsupported) must go out. 



Q. Why is a SMOULDERING WICK sometimes 

 REKINDLED by blowing it ? 



A. The breath carries the air to it 

 with great rapidity ; and the oxygen of 

 the air kindles the red hot wick, as it 

 kindles charred wood. 



