Other vessels are
occasionally used. Pl. LXXXIII shows the use, as the crowning member of
the chimney, of an ordinary water jar, with dark decorations on a white
ground. A vessel very badly broken is often made to serve in chimney
building by skillful use of mud and mortar. To facilitate smoke exit the
upper pot is made to overlap the neck of the one below by breaking out
the bottom sufficiently. The joining is not often visible, as it is
usually coated with adobe. The lower pots of a series are in many cases
entirely embedded in the adobe.
The pueblo builder has never been able to construct a detached chimney a
full story in height, either with or without the aid of chimney pots;
where it is necessary to build such shafts to obtain the proper draft he
is compelled to rely on the support of adjoining walls, and usually
seeks a corner. Pl. CI shows a chimney of this kind that has been built
of masonry to the full height of a story. A similar example is shown in
the foreground of Pl. LXXVIII. In Pl. XXII may be seen a chimney of the
full height of the adjoining story, but in this instance it is
constructed wholly of pots. Pl. LXXXV illustrates a similar case
indoors.
The external chimney probably developed gradually from the simple roof
opening, as previously noted. The raised combing about trapdoors or roof
holes afforded the first suggestion in this direction. From this
developed the square chimney, and finally the tall round shaft, crowned
with a series of pots.
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