Indians. In this instance the ridges, due to a heavy series of
radiating warp filaments, are seen in a vertical position.

[Illustration: FIG. 294. Basket showing ribbed surface produced by
impacting the horizontal or concentric filaments. Moki work--1/8.]

[Illustration: FIG. 295. Alternation of intersection, producing
oblique or spiral ribs. Piute work--1/8.]

[Illustration: FIG. 296. Radiating ribs as seen in flat work viewed
from above. Moki work--1/4.]

It will be observed, however, that the ridges do not necessarily take
the direction of the warp filaments, for, with a different alternation
of the horizontal series--the woof--we get oblique ridges, as shown in
the partly finished bottle illustrated in Fig. 295. They are,
however, not so pronounced as in the preceding case. The peculiar
effect of radiate and concentric weaving upon the ribs is well shown
in Fig. 296.

By changes in the order of intersection, without changing the type of
combination, we reach a series of results quite unlike the preceding;
so distinct, indeed, that, abstracted from constructive relationships,
there would be little suggestion of correlation. In the example given
in Fig. 297 the series of filaments interlace, not by passing over and
under alternate strands, as in the preceding set of examples, but by
extending over and under a number of the opposing series at each step
and in such order as to give wide horizontal ridges ribbed diagonally.

[Illustration: FIG. 297. Diagonal combination, giving herring bone