M. M. Backus, Fur and the Fur Trade (1879)
“ The fur differs from the overhair in that it is soft, silky, curly, downy, and barbed lengthwise, while the overhair is straight, smooth, and comparatively rigid. These properties of fur constitute its essential value for felting purposes, and mark its difference from wool and silk; the first, after some slight preparation by the aid of hot water, readily unites its fibres into a strong and compact mass; the others can best be managed by spinning and weaving. ”
