3^8 On Russian Stoves. 



with a wall of brick or tile, arched. Between the walls 

 and the exterior of the oven, there is a space, into which 

 the commoii air of the room is admitted through apertures 

 which are placed in the brick wall on the level of the 

 hearth ; it there mixes with the heat which it imbibes from 

 the oven, and becoming- sufficiently rarified ascends through 

 the pipes, which are placed in the arched covering of 

 brick, to the top of the room, from whence it is diffused 

 through the whole apartment or carried into other apart- 

 ments, at the option of the owner. The smoke descends 

 from the interior of the oven into a flue which surrounds 

 it, and passing through that flue ascends and escapes by a 

 chimney. 



This description will be better understood by references 

 to the model, in which 



(A) is a foundation of brick or stone, on which the stove 

 stands. 



(B) the grate on which the fire is made. 



(C) a wall of brick surrounding the grate. 



(F) the oven, which is of wrought or cast iron. 



(D) the passage to the smoke flue or chimney. 



(0) the external wall of brick which surrounds the oven 

 with apertures at the floor to admit the air. 



(G) the arch turned over the oven. 



(P. P) the pipes through which the heated air ascends 

 into the room. 



(H) the door of the oven. 



(1) the chimney, or smoke flue by which the smoke 

 escapes, in which there is a regulator, which is nearly 

 closed when there is no smoke. 



There is annexed to this model, a scale of English feet 



