278 Animproved Method of healing Boilers, 



the capital of the iron column. Tliese apertures grovv 

 wider in two of their sides, and closer in the other two, as 

 they approach the furnace, till at la.5t they throw in a thin 

 plate of air of the whole width of the fire. The mouths of 

 these apertures are made of this form for the convenience 

 of more easily shutting them when the tire is to be at any 

 time damped. The coals arc introduced immediately below 

 these apertures over the inclined iron plate, which may be 

 better seen in the vertical section, fig. 1 . 



The plate, illustrating the present article, which is en- 

 graved by Mr. Lowry, is executed in such a masterly man-r 

 ner as to render any further description of the parts unne-? 

 cessarv. A bare inspection of the plate will show them 

 sutHcienliv, without the necessitv of our blotting it over 

 with more letters of reference. The letters A, B, ??2, and 

 0, in fig. I and "2, refer to the same things in both. 



These furnaces answer the pvn-pnse so well, that though 

 the two are both lighted to bring the worts to boil, one of 

 thein is soon after damped out, and the remaining one only 

 kept burning till the process is ended. And it is no uncom" 

 mon thing for the workmen to be under the one-half ot 

 the boiler, making necessary repairs in the furnace, while 

 there is a fire under the other half, from which they are 

 only parted bv the v/all B before described. 



We mentioned in a former number, that the new boiler 

 on Mr. Woolf ^s principles now constructing is intended to 

 be employed in generating steam, to be thrown into the 

 large boilers in this brewery, instead of heating them by 

 fire applied directly to the boilers themselves. The very 

 boiler we have been describing is one of these. But the 

 present arrangement is still to remain, that fires may be 

 employed as heretofore at any time that the new boiler or 

 furnace may need repairs. Besides, there are many busi- 

 nesses v.'hich do not admit of the boilers being heated by 

 f>team ; and to the proprietors of such, the present article 

 cannot fail to prove highly acceptable. 



The liberality of the proprietors of the extensive brewery 

 where this boiler is erected, in admitting the public to par- 

 ticipate in the beneficial result of ecoiiomical experiments, 

 ascertained at a yery great expense, cannot be sufficiently 

 praised. No person to whom a view of their improvements 

 can be any wa/ serviceable is refused admission into their 



firemiscs; xnd we are confident that the public, those at 

 east to whom the economical and benefieiai expenditure of 

 fuel is an object, will feei, as we do, the weight of the ob- 

 ligation. . " . 



XLVIII. Jq- 



