36 



HOT WATER APPARATUS. 



The second figure represents a transverse section across the boiler and 

 furnace, A being the furnace in which the fuel is placed, which is entirely 

 siuTounded with the boiler, except on the under side. B is a check draft, 

 over which the heat, flame, and smoke pass to a small aperture C, in the 

 back of the boilers, which is represented in figure 3, communicating with 

 the flues D D, which surround the louver part ; these flues, D D, unite 

 and pass through an opening (E, figure 1) in the flange, over the furnace 

 door to the flue F F, represented in figure 3 ; this flue surrounds the 

 upper part, and terminates at the brick flue G, which is furnished -^ith a 

 damper to regulate the draft, and there wUl scarcely be a particle of heat 

 lost by continuing this flue to the most distant part of the bmlding. 



The boiler H in figure 4, is in the form of an egg. It is represented in 

 the plan with a chamber all round, connected by the check-draft B, and 

 suiTOimded with the flange I fig. 1, which divides the upper and lower flues. 

 K is a cyhndrical chamber on the top of the boiler, on which is the iron cap I 

 fig. 1, either fixed or moveable, as may be required ; M M are the two outlet 



Gronnd Plan of the Faruace and Boiler. 



pipes, communicating with the upper part of the boiler, through which 

 the hot water circulates. After passing to the outside of the brick work, 

 the pipes are ramified into as many branches as may be reqmi'ed ; N N 

 are the two retm-n pipes which enter the lower pait of the boiler ; is 

 the ash pit, with a door, Q, to regulate the di'aft. The fomace has double 



