Still continuing with the section on Trims from the American Thread Company booklet, we come to fringes. This week will be single fringes. Next week will be double and triple knot fringes.
In order to attach a fringe, the booklet recommends having a mesh to loop the fringe through. As you can see in the picture, the last row of crocheting before the fringe is an open mesh as in filet crochet open mesh ( * dc 1, sk 2, ch 2 * across).
For a single fringe, the booklet suggests cutting the yarn into 5 - 6" long strands. It looks as though there are about 6 strands for each part of the fringe (though, of course, you could use fewer or more strands and shorter or longer strands).
Evidently (after a bit of research on my part), the way the strands are attached is called a cow knot or cow hitch. To attach the fringe, fold the strands in half and slip the folded edge through the mesh from the back. Pull the folded edge through enough to be able to slip the loose ends through. Then pull the loose ends to tighten. Finally, trim the loose ends to make the fringe even across.