CHEMICAL ACTION. 



A. The upper part of a flame is more 

 volatile than the lower parts ; and as it 

 affords less resistance to the air, is 

 reduced to a mere point. 



Q. Why is the UPPER part of a flame more 

 VOLATILE than the lower parts ? 



A. The lower parts of the flame are 

 laden with unconsumed gas and watery 

 vapour ; which present considerable re- 

 sistance to the air. 



Q. Why is the FLAME of a candle BLOWN OUT 

 by a puff of breath ? 



A. As the flame of a candle is attached 

 to a very small wick, a puff of breath 

 severs the flame from the wick ; and it 

 goes out for want of support. 



Q. Why does the FLAME of a candle make a 

 GLASS DAMP, which is held over it ? 



A. The hydrogen of the tallow com- 

 bining with the oxygen of the air, 

 produce a "watery vapour," which is 

 condensed by the cold glass held above 

 the flame. 



Q. Why does our hand, held ABOVE a candle, 

 suffer from the heat of the flame so much more, than 

 when it is placed BELOW the flame, or on ONE SIDK 

 of it? 



