These drains are formed by piercing an opening through the thickness of the coping wall, at a point where the drainage from the roof would collect, the opening being made with a decided pitch and furnished with a spout or device of some kind to insure the discharge of the water beyond the face of the wall. These spouts assume a variety of forms. Perhaps the most common is that of a single long, narrow slab of stone, set at a suitable angle and of sufficient projection to throw the discharge clear of the wall. Fig. 39 illustrates drains of this type, No. 1 being a Tusayan example and No. 2 from Zuñi. It will be noted that the surrounding masonry of the former, as well as the stone itself, are much ruder than the Zuñi example. Another type of drain, not differing greatly from the preceding, is illustrated in Fig. 40. This form is a slight improvement on the single stone drain, as it is provided with side pieces which convert the device into a trough-like spout, and more effectually direct the discharge. No. 1 is a Tusayan spout and No. 2 a Zuñi example. Wooden spouts are also commonly used for this purpose. Fig. 41 illustrates an example from each province of this form of drain. These are usually made from small tree trunks, not exceeding 3 or 4 inches in diameter, and are gouged out from one side. No tubular specimens of wooden spouts were seen. At Tusayan the builders have utilized stone of a concretionary formation for roof drains. The workers in stone could not wish for material more suitably fashioned for the purpose than these specimens. Two of these curious stone channels are illustrated in Fig. 42. Two more examples of Tusayan roof drains are illustrated in Fig. 43. The first of the latter shows the use of a discarded metate, or mealing stone, and the second of a gourd that has been walled into the coping. [Illustration: Fig. 41. Wooden roof drains.] [Illustration: Fig. 42. Curved roof drains of stone in Tusayan.] [Illustration: Plate LXXIV. General view of Ojo Caliente.]