316 



FRUIT-HOUSES. 



stove is first received, and afterwards dis- 

 tributed at pleasure. In addition to the 

 heat given off in this way, the brick cas- 

 ing, from retaining the hot air, together 

 with the flue-pipe passing through it, be- 

 comes so hot as to give off a large quan- 

 tity in a radiating form. In fig. 429, two 



of the flue covers are removed to show 

 the surface of the iron water-troughs fitted 

 on the flue-pipe, and resting on the bot- 

 tom of the brick casing, better seen in 

 sectional view, fig. 430. The troughs are 

 only filled when the heated air is wanted 

 in a humid condition : in other cases, the 

 humidity from the cistern h, which sup- 

 plies water for the ordinary purposes of 

 the house, will be sufficient, i and j are 

 wood wedges inserted on one side of the 

 covers to raise them more or less, in pro- 

 portion to the quantity of heat required ; 

 k is the termination of the flue-pipe, 

 where it ascends, crossing the house above 



the door, and entering the back wall into 

 the chimney. When the house is to be 

 heated, it is only necessary to light the 

 fire in the stove d, and open one of the 

 cold-air drains b c, as in the present in- 

 stance the internal one b is open ; the 

 arrows represent the cold air flowing to- 

 wards the stove where it enters below ; 

 and after traversing a numerous forma- 

 tion of winding channels in a heated 

 state, it discharges itself into the brick 

 casing g g, above the flue-pipe, from 



Fig. 430. 



which it escapes as heretofore mentioned. 

 When the cold air is taken from the ex- 

 ternal drain c, the internal one b is 

 closed — a regulation, however, which is 

 entirely at the discretion of the superin- 

 tendent of the house. I is the regulator 

 in the ash-pit of stove, the handle of 

 which is turned so as to admit a greater 

 or less quantity of air, by which the com- 

 bustion of fuel in the stove is regulated ; 

 m and n are ventilating grates ; o o rods 

 of iron suspended to the frames of the 

 top windows to open and shut them ; p p 

 a system of small roans for conveying the 

 drip from the inside of the roof to the 

 cistern h. The appearance of the front 

 is light and elegant : the main rafters 

 are formed of malleable iron, and the in- 

 tervening sashes of zinc, with an opaque 

 edge, so extremely small as to give the 

 house, at a short distance, the appear- 



