3. A series of short pins (one row sometimes about
1/8 in. shorter than the second row), termed gill or
hackle pins, and set perpendicularly in the above
gills.

The numbers of fallers used is determined partly by the particular
method of operating the fallers, but mostly by the length of the
fibre. The gill pins in the fallers are used to restrain the
movements of the fibres between two important pairs of rollers.
There are actually about four sets of rollers from front to back of
a drawing frame; one set of three rollers constitute the "retaining"
rollers; then comes the drawing roller and its large pressing roller;
immediately after this pair is the "slicking" rollers, and the last
pair is the delivery rollers. The delivery rollers of one type of
drawing frame, called the "push-bar" drawing frame, and made by
Messsrs. Douglas Fraser & Sons, Ltd., Arbroath, are seen distinctly
in Fig. 17, and the can or cans into which the slivers are
ultimately delivered are placed immediately below one or more
sections of these rollers and in the foreground of the illustration.
The large pressing rollers, which are in contact with the drawing
roller, occupy the highest position in the machine and near the
centre of same. Between these rollers and the retaining rollers are
situated the above-mentioned fallers with their complements of gill
pins, forming, so to speak, a field of pins.

Each sliver, and there maybe from four to eight or more in a set, is
led from its sliver can at the far side of the machine to the sliver
guide and between the retaining rollers. Immediately the slivers
leave the retaining rollers they are penetrated by the gill pins of
a faller which is rising from the lower part of its circuit to the