[Illustration: FIG. 310. Reticulated pattern in cotton cloth. Work of
the ancient Peruvians.]

In a similar way four other bands of narrow open work are introduced,
two above and two below the wide band. These are produced by leaving
the warp threads free for a short space and drawing alternate pairs
across each other and fixing them so by means of a woof thread, as
shown in the cut.

Examples of netting in which decorative features have been worked are
found among the textile products of many American tribes and occur as
well in several groups of ancient fabrics, but in most cases where
designs of importance or complexity are desired parts are introduced
to facilitate the work.

_Superconstructive features._--These features, so important in the
decoration of fabrics, are the result of devices by which a
construction already capable of fulfilling the duties imposed by
function has added to it parts intended to enhance beauty and which
may or may not be of advantage to the fabric. They constitute one of
the most widely used and effective resources of the textile
decorator, and are added by sewing or stitching, inserting, drawing,
cutting, applying, appending, &c. They add enormously to the capacity
for producing relievo effects and make it possible even to render
natural forms in the round. Notwithstanding this fact--the most
important section of this class of features--embroidery is treated to
better advantage under color phenomena, as color is very generally
associated with the designs.