The tube 1, fig. 12, can have its position reversed, as shown in fig. 14; six flues can thus be grouped together, as shown in the third plan, fig. 13. The elevation of this stack is given in fig. 15.
Fig. 13.
For a covering to these tubes figs. 16 to 20 show ornamental pots and their sections. The only merit
Fig. 14.
in these may be that they are of a more ornamental character than any that have ever been introduced; they are formed of zinc, supported by a stout dwarf iron railing. The intention is to permit the smoke to escape in any direction, either upwards, sideways, or downwards, sheltering it as far as possible from any action of the wind, and rendering of little consequence whether the stack is high, low, unsheltered or
Fig. 15.
otherwise. If any sudden gust of wind take place and the smoke be driven back, the capping provides larger outlets for its escape than the small aperture of the flue itself; in other words, it is easier for the smoke to pass in any direction rather than return down the flue.