Plate XCVI. Adobe walls in Zuñi.

The small size of available roofing rafters has at Tusayan brought about a construction of clumsy piers of masonry in a few of the larger rooms, which support the ends of two sets of main girders, and these in turn carry series 1, or the main ceiling beams of the roof. The girders are generally double, an arrangement that has been often employed in ancient times, as many examples occur among the ruins. The purpose of such arrangement may have been to admit of the abutment of the ends of series 1, when the members of the latter were laid in contact. In the absence of squared beams, which seem never to have been used in the old work, this abutment could only be securely accomplished by the use of double girders, as suggested in the following diagram, [Fig. 38].

Fig. 38. Showing abutment
of smaller roof beams
over round girders.

The final roof covering, composed of clay, is usually laid on very carefully and firmly, and, when the surface is unbroken, answers fairly well as a watershed. A slight slope or fall is given to the roof. This roof subserves every purpose of a front yard to the rooms that open upon it, and seems to be used exactly like the ground itself. Sheepskins are stretched and pegged out upon it for tanning or drying, and the characteristic Zuñi dome-shaped oven is frequently built upon it. In Zuñi generally upper rooms are provided only with a mud floor, although occasionally the method of paving with large thin slabs of stone is adopted. These are often somewhat irregular in form, the object being to have them as large as possible, so that considerable ingenuity is often displayed in selecting the pieces and in joining the irregular edges. This arrangement, similar to that of the kiva floors of Tusayan, is occasionally met with in the kivas.

In making excavations at Kin-tiel, the floor of the ground room in which the circular door illustrated in [Pl. C], was found was paved with large, irregular fragments of stone, the thickness of which did not average more than an inch. Its floor, whose paving was all in place, was strewn with broken, irregular fragments similar in character, which must have been used as the flooring of an upper chamber.

[ WALL COPINGS AND ROOF DRAINS.]

In the construction of the typical pueblo house the walls are carried up to the height of the roof surface, and are then capped with a continuous protecting coping of thin flat stones, laid in close contact, their outer edges flush with the face of the wall. This arrangement is still the prevailing one at Tusayan, though there is an occasional example of the projecting coping that practically forms a cornice. This latter is the more usual form at Zuñi, though in the farming pueblos of Cibola

it does not occur with any greater frequency than at Tusayan. The flush coping is in Tusayan made of the thinnest and most uniform specimens of building stone available, but these are not nearly so well adapted to the purpose as those found in the vicinity of Zuñi.

Here the projecting stones are of singularly regular and symmetrical form, and receive very little artificial treatment. Their extreme thinness makes it easy to trim off the projecting corners and angles, reducing them to such a form that they can be laid in close contact. Thus laid they furnish an admirable protection against the destructive action of the violent rains. The stones are usually trimmed to a width corresponding to the thickness of the walls. Of course where a projecting cornice is built, it can be made, to some extent, to conform to the width of available coping stones. These can usually be procured, however, of nearly uniform width. In the case of the overhanging cornices the necessary projection is attained by continuing either the main roof beams, or sometimes the smaller poles of the second series, according to the position of the required cornice, for a foot or more beyond the outer face of the wall. Over these poles the roofing is continued as in ordinary roof construction with the exception that the edge of the earth covering is built of masonry, an additional precaution against its destruction by the rains. In many places the adobe plastering originally applied to the faces of these cornices, as well as to the walls, has been washed away, exposing the whole construction. In some of these instances the face of the cornice furnishes a complete section of the roof, in which all the series of its construction can be readily identified. The protective agency of these coping stones is well illustrated in [Pl. XCVII], which shows the destructive effect of rain at a point where an open joint has admitted enough water to bare the masonry of the cornice face, eating through its coating of adobe, while at the firmly closed joint toward the left there has been no erosive action. The much larger proportion of projecting copings or cornices in Zuñi, as compared with Tusayan, is undoubtedly attributable to the universal smoothing of the walls with adobe, and to the more general use of this perishable medium in this village, and the consequent necessity for protecting the walls. The efficiency of this means of protecting the wall against the wear of weather is seen in the preservation of external whitewashing for several feet below such a cornice on the face of the walls. At the pueblo of Acoma a similar extensive use of projecting cornices is met with, particularly on the third story walls. Here again it is due to the use of adobe, which has been more frequently employed in the finish of the higher and newer portions of the village than in the lower terraces. As a rule these overhanging copings occur principally on the southern exposures of the buildings and on the terraced sides of house rows. When walls rise to the height of several stories directly from the ground, such as the back walls of house rows, they are not usually provided with this feature but are capped with flush copings.