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 d f, g e, a part of the open canal of the Chimney.
[ IMAGE ]
Fig. 6.
Shows a section of the same Chimney after it has been altered.
k l is the new back of the Fire-place; l i, the tile or stone which closes the door-way for the Chimney-sweeper; d i, the throat of the Chimney, narrow to four inches; a, the mantle, and h, the new wall made under the mantle to diminish the height of the opening of the Fire-place in front.
N.B. These two Figures are sections of the same Chimney which is represented in each of the four preceding Figures.
[ IMAGE ]
Fig. 7.
This Figure represents the ground plan of a Chimney Fire-place in which the grate is placed in a niche, and in which the original width A B of the Fire-place is considerably diminished.
a b is the opening of the Fire-place in front after it has been altered, and d is the back of the niche in which the grate is placed. See page 347.