SMOKY CHIMNEYS. 65 



A. To contract the opening of the 

 chimney contiguous to the stove. 



Q. Why will a SMALLER OPENING against the 



StOVe PREVENT the SMOKING ? 



A. As all the air (which enters the 

 chimney) must pass near the fire, it will 

 become greatly heated, and rise rapidly 

 through the funnel ; and this increase of 

 heat will compensate for the shortness of 

 the fine. 



Q. Why mil a ROOM SMOKE, if there be TWO 

 FIRES in it ? 



A. Because the fiercer fire will 

 exhaust the most air ; and draw from the 

 smaller one, to supply its demand. 



Q. Why will a chimney SMOKE if there be a 

 FIRE in TWO ROOMS communicating with each 

 other ? 



A. Whenever the door between the 

 two rooms is opened, air will rush from 

 the chimney of the inferior fire, to 

 supply the other ; and both rooms will be 

 filled with smoke. 



Q. What is the REMEDY in this case ? 



A. Let a tube be carried from the 

 hearth of each stove, into the external 



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