Boiler for a Brewhoufe. 167 



of the fire-place, which ferves as a window for obferving the fire, are marked by dotted lines. 

 The pofition of the outfide door of the fire-place is marked by a dotted line, c d. The circular 

 difhing-grate is feen in its place; and the walls of the flues under the boiler are all fecn. The 

 crooked arrows in the flues (how the direction of the flame. 



Fig. 3. is a vertical feftion of the boiler reprefented in the foregoing fig. I. This fe6tion is 

 taken through the middle of the boiler of the fire-place, and of the cover of the boiler. A is 

 the afti-pit, with a feftion of its regifter door. B is the fire-place, and its circular difhing-grate. 

 C is the entrance by which the fuel is introduced, with ftftions of its two doors. D is a fpace ^ 

 left void to fave bricks. E is the boiler, and F its wooden cover, m is the fteam chimney, 

 which is furniflied with a damper. R R is the vertical wall of the houfe againft which the 

 brickwork in which the boiler is fixed is placed, a b \% the curb of timber in which the 

 boiler is fet. The manner in which the cover of the boiler is conftrufled, as well as its form, 

 and the door and windows which belong to it, are all feen diftindtly in this figure. / 



Fiff. 4- is an horizontal fedtion of this fire-place taken on a level with the bottom of the 

 flue which goes round the outfide of the boiler, in which flue, before the fire-place was altered, 

 the flame circulated. The flues under the boiler are, in this figure, indicated by dotted lines. 



Fig. 5. is an horizontal feiSion of the fire-place of the brew-houfe boiler, at a level with the top 

 of the flues under the boiler, after the flue round the outfide of the boiler had been flopped up, or 

 rather the flame prevented from circulating in it. This figure (hows the adual flate of the 

 fire-place at the prefent time. The crooked arrows fhovv the direction of the flame in the 

 flues. — a, b, are the two canals (each of which is furniflied with a damper) by which the finoke 

 goes ofF into the chimney; — and c,c, c, c,c,c, are fix fmall openings communicating with the 

 flues, by which the flame and hot vapour can pafs up into the cavity on the outfide of the boiler, 

 which formerly ferved as a flue. 



Fig. 6. is a/ront view of the afli-pit door of this brew-houfe fire-place, with its regifter. This 

 door is clofed by means of a latch of a particular conftrudlion, which is fliown in the figure. 

 Fig. 7. is the door without its regifter ;: — and 

 Fig. 24. the circular plate of the regifter reprefented alone. 



In con'.lrudting thefe regifter doors, and in general all iron doors for fire-places, great and 

 fmall, the door fliould never be fliut in a rabbet, or groove, in the frame, but ftiould merely 

 Jhut down on the front edge of the frame, which edge, by grinding it on the flatfurface of a large 

 ^atftone, fliould be made quite level to receive it. If this be done, and if the plate of iron 

 which conftitutes the door be made quite flat, and if it be properly fixed on its hinges, the door 

 will always fliut with facility and clofe the opening with precifion, notwithftanding the efFedts 

 of the expanfion of the metal by heat ; but this cannot be the cafe when the doors of fire-places 

 are fitted in grooves and rabbets. Where the heat is very intenfe, the frame of the door fhould 

 be made of fire-ftone ; and that part of the door which is expofed naked to the fire fliould be co- 

 vered either with a fit piece of fire-ftone, faftened to it with clamps of iron, or a fufficient 

 number of ftrong nails, with long necks and flat heads, or of ftaples, being driven into that fide 

 of the plate of iron which forms the door which is expofed, fliould be covered with a body about 



Z ^ two 



