548 Of Chimney Fireplaces. 



PLATE IX. 



FIG. 3. 



This figure shows how the fireplace represented by 

 the Fig. i is to be altered, in order to its being im- 

 proved. 



A B is the opening in front, C D the back, and A C 

 and B D the covings of the fireplace in its original 

 state. 



a b its opening in front, / k its back, and a i and b k 

 its covings after it has been altered ; e is a point upon 

 the hearth upon which a plumb suspended from the 

 middle of the upper part of the breast of the chimney 

 falls. The situation for the new back is ascertained by 

 taking the line ef equal to four inches. The new back 

 and covings are represented as being built of bricks, and 

 the space between these and the old back and covings as 

 being filled up with rubbish. See page 523. 



FIG. 4. 



This figure represents the elevation or front view of 

 the fireplace (Fig. 3) after it has been altered. The 

 lower part of the doorway left for the chimney-sweeper 

 is shown in this figure by white dotted lines. See page 



52S- 



