Mode of Heating Rooms by Steam. 1 79 



furnace conveys the smoke into the cast iron stove pipes, I, 

 2, 3, 4. These pipes are placed in a space in the gable, en- 

 tirely inclosed with brick, except at the small apertures, 5, 6, 

 7, 8. A current of air is admitted below at 9, and thrown 

 into the rooms by those openings, after being heated by con- 

 tact with the pipes. This part of the plan is adopted with a 

 view to prevent, as much as possible, any of the heat, pror 

 duced bv the fuel used, from being thrown away. It may be 

 omitted where any danger of fire is apprehended from it, 

 and the smoke may be carried off in any way that is consi- 

 dered absolutely secure. So far, however, as the memo- 

 rialist is able to judge, there seems to be little or no danger 

 of fire from a stove of this construction. The greatest in- 

 convenience of a common stove is, that the cockle or metal 

 furnace is liable to crack from the intensity of the heat. By 

 the continuity of the metal from the fire-place, an intense 

 heat is also conducted along the pipes, which exposes them 

 to the same accident. Here the smoke being previously 

 conveyed through a brick flue, can never communicate to 

 the pipes a degree of heat sufficient to crack them. In like 

 manner the pipes, having no communication with the rooms 

 but by the small apertures, cannot come in contact with any 

 combustible substance ; and from being surrounded with 

 air, which is constantly changing, can impart only a very 

 iDoderatc degree of heat to the walls. The iron supporters of 

 the pipes may be imbedded in some substance which is a 

 bad conductor of heat, as furnace ashes and lime, &c. The 

 emission of heated air into the rooms may be regulated by 

 valves. As the pipes are not exposed to cracking, there is 

 no risk of their throwing smoke or vapour into the rooms. 



The boiler /', b, is six feet long, three and a half broad, 

 and three feet deep. As there is nothing peculiar in the 

 feeding apparatus, it is on^itted. The bpjler may be placed in 

 any convenient situation. Where a steam engine is used 

 for other purposes, the steam may be taken from its boiler. 

 The pipe c, c, conveys the steam from the boiler to the first 

 perpendicular pipe d, d, d. There is an expanding joint at e, 

 stuffed, to make it steam tight. The steam ascending in 

 the first pipe d, d, dy enters the horizoBtal pipe f,f,f,J\ 

 M 3 which 



