“…°T he effect on migration of differences in component staple length and in denier has already been considered by several workers. Rudolph [24] carried out numerous investigations and has summarized the findings of several other workers [4,15,16,27], while Morton [18], Townend [25 ] , the American Viscose Corporation [ 1 ] , and others [3,' S, 7, 14, 20, 26 ) have made contributions in this respect. With regard to the effect of fiber denier, the majority view seems to he that relatively coarse and, hence, stiffer fibers tend to exhibit outward migration; but there remains considerable disagreement as to the effect of differences in staple length.…”