THE FLORAL WORLD AND GAEDEN GUIDE. 



259 



bricks, and the front consists of narrow ventilating shutters between tbe 

 sill and the plate. The stove is a handsome piece of furniture, and occu- 

 pies a place in tb.3 centre of the house at a. A four-inch iron flue, sus- 



Border. 



Path. 



pended by wires to the rafters, goes across the border, within about a foot 

 of the front shutters, and then turns at b, and is continued to the end, 

 where it passes into the drain-pipe chimney, the length of horizontal 

 pipe being about sixteen feet, and the chimney six feet. We are thus 

 particular in giving details, because, as this is a slow-combustion stove, 

 it must be so placed as to insure a good draught ; granting which, we 

 have no hesitation in pronouncing it a most useful and valuable invention. 

 The principle of Musgrave's slow-combustion stove may be understood 

 at a glance by means of the annexed sectional diagram. The fire-box is 

 an upright tube lined with fire-clay, and holding sufficient fuel for 

 twenty-four hours. The top of this opens into a chamber, and thence 

 into a second chamber, whence it escapes into the proper flue. Thus, 

 before the heated air 

 reaches the point of exit, 

 nearly all the heat has 

 been abstracted from it 

 in the chambers, and 

 there is only just enough 

 left to warm the flue, 

 which is the reason why 

 a descending flue, or a 

 flue interfered with in 

 its draught by adjoining 

 buildings, will not an- 

 swer. The economy of 

 fuel is accomplished to 

 an extreme nicety, and 

 hence, as there is little 

 or no heat given out by 

 the flue, it may as well, 

 where convenient, be 

 carried straight up into 

 the atmosphere by means 

 of an earthen pipe, or 

 into a brick flue, if there 



happens to be such in the back wall. The way in which the heat gene- 

 rated and distributed among the three chambers is conveyed to the atmo- 

 sphere of the house, independent of radiation from the exterior of the stove 

 itself, is that on which its efficiency mainly depends. The stove is pierced 

 all over with cells, and the cold air of the house circulates internally 

 through the chambers without contact with the fire, as shown by the bent 

 arrow in the diagram (Fig. 1), there being two air-chambers and four air- 

 pipe connections, so that the stove feeds itself with cold air below, and 

 gives out warm air over the whole of its upper surface through the orna- 



Fie. 1. 



