The most successful form of heating coal stove of the century has been one that combined in itself the features of base-burning: that is, a covered magazine at the centre or back of the stove open at or near the top of the stove into which the coal is placed, and which then feeds to the bottom of the fire pot as fast as the coal is consumed, a heavy open fire pot placed as low as possible, an ash grate connected with the bottom of the pot which can be shaken and dumped to an ash box beneath without opening the stove, thus preventing the escape of the dust, an illuminating chamber nearly or entirely surrounding the fire pot, provided with mica windows, through which the fire is reflected and the heat radiated, a chamber above the fire pot and surrounding the fuel chamber and into which the heat and hot gases arise, producing additional radiating surface and permitting the gases to escape through a flue in the chimney, or, leading them first through another chamber to the base of the stove and thence out, and dampers to control and regulate the supply of air to the fuel, and to cut off the escape or control the course of the products of combustion. The cheerful stove fireplace and stove of Franklin and the French were revived, combined and improved some years ago by Capt. Douglas Galton of the English army for use in barracks, but this stove is also admirably adapted for houses. It consists of an open stove or grate set in or at the front of the fireplace with an air inlet from without, the throat of the fireplace closed and a pipe extending through it from the stove into the chimney. Although a steady flow of heat, desirable regulation of temperature and great economy in the consumption of fuel, by reason of the utilisation of so much of the heat produced, were obtained by the modern stove, yet the necessity of having a stove in nearly every room, the ill-ventilation due to the non-supply of pure outer air to the room, the occasional diffusion of ash dust and noxious gases from the stove, and inability to heat the air along the floor, gave rise to a revival of the hot-air furnace, placed under the floor in the basement or cellar, and many modern and radical improvements therein.