Fire-places and Kitchen Utensils. 415 



measured from g to m. This conical fire-place has 

 a flat rim above, which is } an inch wide, and turned 

 outwards ; and another below of equal width which is 

 turned inwards. The first serves to suspend it in its 

 place, the second serves to support its circular grate 

 on which the fuel burns. 



The air is admitted into the fire-place through a hole, 

 n, about \\ inches in diameter, in the side of the fur- 

 nace. This aperture must be furnished with a register 

 similar to that shown in the Fig. 61. 



The provision for carrying off the smoke is similar 

 in all respects to that used in the portable furnace above 

 described, constructed of cast iron ; and it will easily 

 be understood, from a bare inspection of the Fig. 63, 

 without any farther explanation. 



Having shown how this portable kitchen furnace 

 may be constructed of cast iron, and also how it may 

 be made of sheet iron, I shall now show how it may be 

 made partly of cast iron and partly of sheet iron. A fire- 

 place of cast iron, like that represented in the Fig. 62, 

 may be used in a furnace of sheet iron; but, when 

 this is done, the fire-place must be cast with a pro- 

 jecting rim above, in order that it may be suspended 

 in its place. The sand-rim may likewise be of cast 

 iron, and it may be fastened to the inverted hollow 

 cone, c, d, e, f, by rivets. 



The short tube, /, which serves to support the tube 

 which carries off the smoke, may also be made of cast 

 iron, and it may be fastened to the outside of the fur- 

 nace by three rivets. As it may be made of such a 

 form that its mould will deliver from the sand, it will 

 cost less when made of cast iron than when made of 

 sheet iron; and it will have another advantage, its 



