f?^ All vnf>roved Method of heating Boilers. 



The merit and success of the construction seerns to (de- 

 pend on making the flame and heated air impinge, and as 

 rt were press against 'he boiler, instead of merely passing 

 along easily to the flui . For this purpose Mr. Woolf, the 

 engineer at the brewery, keeps his fire forward and forces 

 the flame, by interposing a wall or breast-work A (fig. I . 

 Plate VII.) between it and the flue, to play against the bot- 

 tom of the boiler, to which a large portion of heat is given 

 bB" before the current of flame and heated air, which is next 

 carried round the boiler, can find its way to the chimney. 



In fact, th^re are two fire-places under each of Messrs. 

 IVleux's large boilers, separated from each other by a party- 

 wall B, fig. 2. In this figure one of the fire-places only iw 

 3ho\\ n, and the party-wall ;■ that is, a little more than one- 

 half of a horizontal section of the furnace. The wall AB, 

 iiesides answering the purpose of separating the furnaces^ 

 as already liientionetl', serves to support the bottom of the 

 boiler C, which carries an inimcns<^ weight when filled with' 

 liquor. The u-pper part of the boiler is not shown in the 

 engraving. It is rW)t an ooen boiler but fi^'nisbed in the form 

 of a dome-, the summnt of winch rises from the centre of 

 the bottom to a little more than twice the height of the part 

 ■shown ia the figure. At a convenient part it is furnished 

 with a man-hole, to which a steam-tight cover is fitted, for 

 the convenience of admitling the workmen to clean it out 

 vhen necessary, and another hole, also fitted with a cover, 

 for admitting the hops. 



The extremity of the bottom, or the lag, as it is called, 

 of the boiler, rests on brick-work a (fig. 2.), and that part- 

 of it which comes immediately over the fire is defended by 

 brick-work a (fig. 1 .), as experience showed that this pre- 

 caution was necessary. 



After the flame has- passed from the bars of the furnace 

 over the breast-work A, striking with force against the hot-- 

 tom of the boiler, it finds its way into the circular flue D, 

 which goes round the boiler to the place where it is joined 

 to the chimney £, by the opening or door F, which is fur- 

 nished with a vent and register in the usual method, and 

 which is shown in the figure. The flame and heated air is 

 not allowed, however, in passing into the circular flue D, 

 to keep in contact with the copper, but is forced first to 

 descend and pass under a little arch ?«, by which contri- 

 vance that part of the boiler, which otherwise would soon be 

 cut aw ay, as it were, by the intense point of the flame^ is 

 tlefendcd from injury. 



In these furnaces Mr. Roberton's contrivance for burning 



the smoke is made use otj which is found completely to 



5 answer 



