3S2 , HEATIN& ROOMS BY STEAM. 



History and ac- escape. In the mill just mentioned, the lying cast iron pipe 

 mrthodofTeat-^^ *^^^ ^^'^*'''**'^>'' ** ^^"^^*^ through the gables of the mill, 

 \ng rooms by and furnished with valves for the egress of the air. It is 

 unnecessary to repeat, that the same valves serve for the 

 discharge of the air in heating the a|)paratus, and of the 

 steam itself, when its expansive force becomes too great. 

 In both mills, each of the perpendicular pipes is provided 

 with a valve, to prevent a vacuum; and in the second mill 

 the lying pipes for carrying the steam into the_ detached 

 rooms have each two valves, one opening inwards, and the 

 other outwards. 



Certificates of five other mills being heated in a similar 

 Inanner, by the direction of the memorialist, are presented 

 to the Society. 



The application of the principle to buildings already con-, 

 structed, it is presumed, will be sufficiently obvious from 

 the foregoing details. In new manufactories, where the 

 mode of heating may be made a part of the original plan, 

 a more convenient apparatus may be introduced. This will 

 be best explained by a description of the drawing. Fig. 2. 

 which gives a section of a cotton mill constructed in a man- 

 ner which the memorialist would adopt, were he to apply 

 the steam apparatus to a new building, or any other that 

 would permit such an apparatus from its regular construc- 

 tions. In an old mill in this place, an apparatus is now 

 erecting by the advice of the memorialist, conformable to 

 this plan, which is likely to be generally adopted in new 

 cotton mills. 



The furnace for the boiler is shown at a. The flue of the 

 furnace conveys the smoke into the cast iron stove pipes, 1, 

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

 enclosed 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 

 contact with the pipes. This part of the plan is adopted 

 with a view to prevent, as much as possible, any of the 

 heat, produced by the fuel used, from being thrown away: 

 It may be omitted M'here any danger of fire is apprehended 

 from it, and the smoke may be carried off in any way that 

 is considered abiolutcly secure. So far, however, as the 



memorialist 



