of the work so that the drawing will show the work as clearly as possible.

The elevation of the house shown in

Fig. 14 shows by the letters A and B just how high up on the roof the two stacks come through, and by the letters C, D, E, and F the several floors.

Such work as this, we believe, will be of the greatest benefit to any man following this series, and we believe that if he has followed carefully what has gone before, in the preceding chapters, he can handle the work without much difficulty.

Fig. 108.

the work of such a system as the one shown in our illustration is shown more clearly and to better advantage by making separate elevations of different parts of the work, viewing the several parts from the most advantageous position, rather than to show it all in one elevation. However, it sometimes happens

FIG. 109.

which the stacks pass through the roof brings to mind the fact that a roof plan is sometimes very useful in showing this location. We therefore present Fig. 106 as a roof plan of the residence, of which we have been showing plans and elevations. This plan shows the exact location of the four stacks, A, B, C and D.

While dealing with this part of the work it will be well to take up the subject of roof connections, and to that end we show several methods of doing this