suffice to illustrate the principles involved and to make clear the
bearing of this class of phenomena upon decoration. I choose, first, a
number of examples from the simplest type of weaving, that in which
the web and the woof are merely interlaced, the filaments crossing at
right angles or nearly so. In Fig. 291 we have the result exhibited in
a plain open or reticulated fabric constructed from ordinary untwisted
fillets, such as are employed in our splint and cane products. Fig.
292 illustrates the surface produced by crowding the horizontal series
of the same fabric close together, so that the vertical series is
entirely hidden. The surface here exhibits a succession of vertical
ribs, an effect totally distinct from that seen in the preceding
example. The third variety (Fig. 293) differs but slightly from the
first. The fillets are wider and are set close together without
crowding, giving the surface a checkered appearance.

[Illustration: FIG. 291. Surface relief in simplest form of
intersection.]

[Illustration: FIG. 292. Surface relief produced by horizontal series
crowded together.]

[Illustration: FIG. 293. Surface relief produced by wide fillets set
close together.]

The second variety of surface effect is that most frequently seen in
the basketry of our western tribes, as it results from the great
degree of compactness necessary in vessels intended to contain
liquids, semiliquid foods, or pulverized substances. The general
surface effect given by closely woven work is illustrated in Fig. 294,
which represents a large wicker carrying basket obtained from the Moki