THE _German_ Stove is not unlike a Chest for Cloaths set upon one End, and is fixed into the Wall, with the Top turned outwards, or into another Room, which open and shut as there is occasion for making and mending the Fire: it warms a Room all over in a very little Time, with little Fuel to make a Fire; no fresh Air can enter the Room if the Door be left open, no more than it would in an open Oven, because there is not the least Discharge of Air in the Room. But there is not any Appearance of Fire to be seen in these Stoves, and they who used them were obliged to breathe the same unchanged elemental Air, mixed with that inspired by all the Company. FOURTHLY, the Chimney, in the House of Lords, which was designed by way of an Improvement upon the Sieur _Gauger_’s Chimnies. FOR _First_, the outward Air, from below the House, in the Passage, enters under the Iron Plate, (commonly called the Hearth-Plate) which is prepared to receive it into a re-curved Canal, and from thence passes up the back Plate of Iron, in the like Turnings and Windings, near to the Top, where it is divided, and enters into two Tubes of Copper, one placed on each side of the Funnel, of a sufficient Length to appear above the Cornish; there they are joined to other Conveyances; one of which is carried round the Throne, and ends over-against the Fire; and the other Conveyance is continued to the Window, above the Cornish, made of Tin, in form of a right-angled Triangle, and is perforated to let out the Air. There is likewise a Valve in each of these Copper Pipes or Tubes, placed at a considerable distance from the Fire, to open and shut at pleasure, by a Thumb-Latch, which being shut, imprisons the Air in its Passage upwards, until it be hot, and when opened, discharges this warmed Air near the Cieling, through those perforated Conveyances. ACCORDING to the Construction of this Fire-Place, it is next to an Impossibility to warm that House with the greatest Fire that can be made in it: For all the upright Heat is lost, occasioned by the continual Current of Air coming in at the Doors and Crevices, which forcibly drives almost all the Heat up the Chimney.