68 CHEMICAL ACTION. 



A. If both door and chimney be 

 placed on the same side of a room, the 

 chimney will often smoke. 



Q. Why will a CHIMNEY SMOKE, if the DOOR 

 and STOVE are both on the SAME SIDE ? 



A. Because when the door is opened, 

 a current of air will blow into the 

 chimney -place, and drive the smoke 

 into the room. 



Q,, What REMEDY can be applied to this evil ? 



A. The door must be set opposite 

 to the chimney, or nearly so ; and then 

 the draught from the door will blow the 

 smoke up the chimney, and not into the 

 room. 



Q. Why will a CHIMNEY SMOKE if it NEEDS 

 SWEEPING? 



A. Because the obstruction in the 

 chimney (presented by the loose soot, 

 to the free passage of the smoke) delays 

 its current, and prevents the draught. 



Q. Why will a CHIMNEY SMOKE, if OUT 

 OF REPAIR ? 



A. 1st Because the loose mortar 

 and bricks obstruct the smoke : and 



