For a plaid effect, string the warp at regular intervals, with different colors. Then weave the same colors at equal intervals to form the plaid. (See illustrations, pages 92, 98, and 101.) Shawls, carriage blankets, etc., woven in this way are very attractive.
A striped warp is strung in the same way. (See illustrations, pages 101 and 117.) The stripes could be continued through the mat, if desired, by weaving only _one_ color in the woof. By weaving _two_ colors squares are obtained such as those seen in the corners.
For weaving with carpet ravelings or rags, and sometimes double wool, where a plain effect is desired, the warp should be of common twine, as near the color of the work as possible. Carpet thread is good, especially for the double warp in Turkish rugs. Balls of warp string can be obtained at department stores. Oriental cord comes in several colors, and can be had at a few cents a ball at the notion and stationery counters in department stores.
The warp should always be one continuous string, and several inches should be left at each end in order to fasten securely when the work is finished. If preferred, the warp ends can be fastened before the weaving is commenced. Care should be taken to place the first and last strings of the warp directly _over_ the rods, and, in weaving, to pass the woof threads entirely around the _rods and strings_ to insure straight edges. The ends of wool warp threads should be wound in and out of the notches to the right and left of rods, to fasten them until the weaving is finished. It sometimes happens that little children, and more especially those who are blind, pull up the warp strings when near the end of the work. In such cases it is a good plan to pass a rubber band _over_ the warp strings at the top of the loom and _behind_ the bars, back of the head piece, making it set up close by putting it around one tooth at each end. In this way the warp strings cannot possibly slip out of the notches.
[Sidenote: _Splicing with a weaver's knot_]
Some teachers splice the warp with a weaver's knot, an illustration of which can be seen in any large dictionary. The continuous string is to be preferred, however, as experience has proved that even a weaver's knot will sometimes fail to stand the stress of weaving. It is very difficult to splice a warp of raffia. It is better to knot the warp threads in pairs (see directions, page 46), leaving two or three inches beyond the head and foot. These ends may be used for a fringe by tearing very fine, or they may be run down in the woven part with a darning needle, as rattan is run down in basket work.