Q. _Why cannot the wind enter a chimney flue, if it be carried up HIGHER than the steeple or hills?_ A. Because the reflected wind would strike against the _sides_ of the chimney-flue, and not pass over the _opening_ at all. Q. _In what OTHER cases will a CHIMNEY SMOKE?_ 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 2ndly--The _cold air_ (oozing through the chinks) _chills the air in the chimney_, and prevents its ascent. Q. _Why will an ARNOTT'S STOVE SMOKE, if the joints of the flue do not fit air-tight?_ A. Because the _cold air_ (which gets through the joints) _chills the air in the flue_, and prevents its ascent. Q. _Why does an old fashioned FARM CHIMNEY-PLACE so often smoke?_ A. Because the opening is so _very large_, that much of the air which goes up the chimney, _has never passed near the fire_; and this cold air mixing with the other, so _reduces its temperature_, that it ascends very slowly, and the draught is destroyed. Q. _Why does a chimney smoke, if the DRAUGHT be SLACK?_ A. Because, unless the current of air up the chimney be very powerful, it cannot _buoy the smoke up_ through the flue. Q. _If the opening of a chimney be TOO LARGE, what REMEDY can be applied?_ A. The chimney-place must be contracted. Q. _Why will CONTRACTING the chimney-place PREVENT its SMOKING?_ A. As the air will then pass _nearer the fire_, it will be _more heated_, and fly up the chimney _much faster_. Q. _Why do almost all CHIMNEYS SMOKE in GUSTY weather?_ A. The gust (blowing the air _away_ from the top of the chimney) _removes_ (for a time) _all resistance to the smoke_: but when the wind _lulls_ again, the _resistance of the air suddenly returns_--the _draught_ is _checked_--and a puff of smoke rushes into the room. Q. _What is the use of a CHIMNEY-POT?_ A. When the opening of a chimney is _large_, the top must be contracted by a chimney-pot, in order to increase the draught. Q. _How does a CHIMNEY-POT INCREASE the DRAUGHT of a chimney?_ A. As the _same quantity_ of hot air has to escape _through a much smaller opening_, it must pass through more quickly. Q. _Why do tin BLOWERS help to get a fire up?_