combining them by plaiting, and in such a way as to leave a border of
open work.

Now the two types of construction, the interlaced and the twined, some
primitive phases of which have been reviewed and illustrated, as they
are carried forward in the technical progress of the art, exhibit many
new features of combination and resultant surface character, but the
elaboration is in all cases along lines peculiar to these types of
weaving.

Other types of combination of web and woof, all tapestry, and all
braiding, netting, knitting, crochet, and needle work exhibit
characters peculiar to themselves, developing distinct groups of
relieved results; yet all are analogous in principle to those already
illustrated and unite in carrying forward the same great geometric
system of combination.

_Reticulated work._--A few paragraphs may be added here in regard to
reticulated fabrics of all classes of combination, as they exhibit
more than usually interesting relievo phenomena and have a decided
bearing upon the growth of ornament.

In all the primitive weaving with which we are acquainted definite
reticulated patterns are produced by variations in the spacings and
other relations of the warp and woof; and the same is true in all the
higher forms of the art. The production of reticulated work is the
especial function of netting, knitting, crocheting, and certain
varieties of needlework, and a great diversity of relieved results are
produced, no figure being too complex and no form too pronounced to be
undertaken by ambitious workmen.