Democratic Sentinel, Volume 3, Number 12, Rensselaer, Jasper County, 2 May 1879 — How to Air a Boom. [ARTICLE]

How to Air a Boom.

It is the general practice to open only the lower part of the windows of a room in ventilating it, whereas, if the upper part were also*opened, the object would be more speedily effected. The air in an apartment is usually heated to a higher temperature than the outer air, and it is thus rendered lighter, and as the outer air rushes in, the warmer and lighter air is forced upward, and, finding no outlet, remains in the room. If a candle be held in the doorway near the floor, it will be found that the flame will be blown inward; but, if it be raised nearly to the top of the doorway, it will go outward; the warm air flowing out at the top, while the cold air flows in at the bottom. A current of air from the room is generally rushing up the flue of the chimney if the flue be open, even though there should be no fire in the stove; therefore open fire-places are the best ventilators we can have for a chamber, with an opening arranged in the chimney from the ceiling.