In the construction of the chimneys which appear in the plans submitted, the great majority of them--particularly those for northern latitudes--are placed in the interior of the house. They are less liable to communicate fire to the building, and assist greatly in warming the rooms through which they pass. In southern houses they are not so necessary, fires being required for a much less period of the year. Yet even there they may be oftentimes properly so placed. Where holes, for the passage of stovepipes through floors, partitions, or into chimneys, are made, stone, earthen, or iron thimbles should be inserted; and, except in the chimneys, such holes should be at least one to two inches larger than the pipe itself. The main flues of the chimney conducting off the smoke of the different fires, should be built separate, and kept apart by a partition of one brick in thickness, and carried out independently, as in no other way will they rid the house of smoky rooms. [Illustration] An illustration in point: Fifteen years ago we purchased and removed into a most substantial and well-built stone house, the chimneys of which were constructed with open fireplaces, and the flues carried up separately to the top, where they all met upon the same level surface, as chimneys in past times usually were built, thus. Every fireplace in the house (and some of them had stoves in,) smoked intolerably; so much so, that when the wind was in some quarters the fires had to be put out in every room but the kitchen, which, as good luck would have it, smoked less--although it did smoke there--than the others. After balancing the matter in our own mind some time, whether we should pull down and rebuild the chimneys altogether, or attempt an alteration; as we had given but little thought to the subject of chimney draft, and to try an experiment was the cheapest, we set to work a bricklayer, who, under our direction, simply built over each discharge of the several flues a separate top of fifteen inches high, in this wise: The remedy was perfect. We have had no smoke in the house since, blow the wind as it may, on any and all occasions. The chimneys _can't_ smoke; and the whole expense for four chimneys, with their twelve flues, was not twenty dollars! The remedy was in giving each outlet a _distinct_ current of air all around, and on every side of it. [Illustration] CHIMNEY TOPS.