Fire-places and Kitchen Utensils. 377 



found that both the boiler and its cover are of forms 

 that will readily deliver from their moulds; and that 

 circumstance will enable iron-founders to sell these 

 articles at low prices. 



The mass of brick-work in which this boiler is set 

 may be a cube of 3 feet ; or, by sinking the ash-pit in 

 the ground, its height may be reduced to z\ feet. 



In order that the flame may be made to separate and 

 spread equally on all sides under the lower boiler, the 

 smoke should be made to pass off in two small canals 

 situated on opposite sides of the boiler. The openings 

 of these canals may be a little below the level of the 

 bottom of what has been called the upper boiler ; and 

 the smoke, being made first to descend nearly to the 

 level of the bottom of the lower boiler, may then pass 

 off horizontally towards the chimney. The situation 

 of the two horizontal canals (on opposite sides of the 

 boiler) by which the smoke goes off is indicated (in 

 Fig. 44) by dotted lines. 



So much has already been said in the foregoing 

 chapters relative to the construction of closed fire- 

 places for kitchen boilers, that it would be quite super- 

 fluous to give any particular directions respecting the 

 construction of the fire-place for this boiler. The man- 

 ner in which the boiler is set in brick-work, and the 

 means that are used for causing the smoke to surround 

 it on every side, are distinctly shown in the figure. 



In order more effectually to confine the heat, the 

 boiler should be entirely enclosed in the brick-work on 

 every side, in such a manner that the brim of its steam- 

 rim should not project above it more than half an inch. 

 To preserve the brick-work from being wetted, the top 

 of it may be covered with sheet lead, which may be 



