Where chambers are carried into the roof of a house, to any extent, they are sometimes incommoded by the summer heat which penetrates them, conducted by the chamber ceiling overhead. This heat can best be obviated by inserting a small window at each opposite peak of the garret, by which the outside air can circulate through, above the chambers, and so pass off the heated air, which will continually ascend. All this is a simple matter, for which any builder can provide, without particular expense or trouble. INTERIOR ACCOMMODATION OF HOUSES. Ground, in the country, being the cheapest item which the farmer can devote to building purposes, his object should be to _spread over_, rather than to go deeply into it, or climb high in the air above it. We repudiate cellar kitchens, or under-ground rooms for house work, altogether, as being little better than a nuisance--dark, damp, unhealthy, inconvenient, and expensive. The several rooms of a farm dwelling house should be compact in arrangement, and contiguous as may be to the principally-occupied apartments. Such arrangement is cheaper, more convenient, and labor-saving; and in addition, more in accordance with a good and correct taste in the outward appearance of the house itself. The general introduction of cooking stoves, and other stoves and apparatus for warming houses, within the last twenty years, which we acknowledge to be a great acquisition in comfort as well as in convenience and economy, has been carried to an extreme, not only in shutting up and shutting out the time-honored open fireplace and its broad hearthstone, with their hallowed associations, but also in prejudice to the health of those who so indiscriminately use them, regardless of other arrangements which ought to go with them. A farm house should never be built without an ample, open fireplace in its kitchen, and other _principally_ occupied rooms; and in all rooms where stoves are placed, and fires are daily required, the _open_ Franklin should take place of the close or air-tight stove, unless extraordinary ventilation to such rooms be adopted also. The great charm of the farmer's winter evening is the open fireside, with its cheerful blaze and glowing embers; not wastefully expended, but giving out that genial warmth and comfort which, to those who are accustomed to its enjoyment, is a pleasure not made up by any invention whatever; and although the cooking stove or range be required--which, in addition to the fireplace, we would always recommend, to lighten female labor--it can be so arranged as not to interfere with the enjoyment or convenience of the open fire.