394 



On tfie Construction of Kitchen 



to the flame, it will soon be warped and thrown out 

 of its place. If, instead of casting this plate in one 

 piece, it be formed of two pieces, each 18 inches square, 

 the bad effects produced by the expansion of the metal 

 by heat will be greatly lessened, and this precaution 

 has been taken in most of the register-stoves on these 

 principles that have been put up in London ; but by 

 an experiment lately made at Heriot's Hospital, at 

 Edinburgh, I have been convinced that the large plates 

 may be depended on if they are properly set. 



I have described the cylinder in which the stewpan 

 or boiler is suspended as being a separate thing. It 

 is right, however, that I should inform the reader that, 

 in almost all cases where register fire-places of this kind 

 have hitherto been put up, this cylinder has been firmly 

 and inseparably united to the stewpan, so much so as 

 to make a part of it, the handle even being attached 

 to this cylinder instead of being joined immediately to 

 the stewpan. The following figure, which represents a 

 vertical section of one of these stewpans and its cylin- 

 der, will show how they have hitherto generally been 

 constructed : 



Fig. 51. 



a, b, c, d, represents a vertical section of the cylinder, 

 which is \\\ inches in diameter and 8 inches high. 

 Into this cylinder, which is open at both ends, the 



