besides lying between the weft, is thrown on both sides of the fabric,
for the purpose of forming figures thereon. It will, therefore, be
seen that a carpet made according to Fig. 1 will show five
colors--three colors produced by the weft and two colors produced by
the ingrain warp. Fig. 2 represents a carpet made with two-ply, in
which case only four colors will be produced, two by the weft and two
by the ingrain warp. It is, consequently, obvious that a carpet made
in the manner above described will have a corresponding pattern or
figure on both its sides, allowing it to be used on both sides. Fig. 3
also shows a two-ply carpet, but, in this case, six colors are
produced, i.e., two colors by the weft and four by the ingrain warp,
marked d, d¹, e, and e¹, the warp being so manipulated by the harness
as to make the carpet reversible, and having a corresponding pattern
or figure on both sides.--_Journal of Fabrics._

[Illustration: Fig. 1]

[Illustration: Fig. 2]

[Illustration: Fig. 3]


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ARÆO-PICNOMETER.