55 Of Chimney Fireplaces. 



PLATE X. 



FIG. 5. 



This figure shows the section of a chimney fireplace 

 and of a part of the canal of the chimney on the com- 

 mon construction. 



a b is the opening in front ; b c the depth of the fire- 

 place at the hearth ; d the breast of the chimney. 



d e, the throat of the chimney, and df, g e, a. part of 

 the open canal of the chimney. 



FIG. 6. 



Shows a section of the same chimney after it has been 

 altered. 



k I is the new back of the fireplace ; / i the tile or 

 stone which closes the doorway for the chimney-sweeper; 

 d i the throat of the chimney, narrowed to four inches; 

 a y the mantle, and <, the new wall made under the man- 

 tle, to diminish the height of the opening of the fireplace 

 in front. 



N. B. These two figures are sections of the same 

 chimney which is represented in each of the four pre- 

 ceding figures. 



