Another modification of the Invention which may be applied in certain cases, that is to say, when it is required to imitate the skins of animals having wavy or frizzled hair, such as those known under the name of otter's or astracan fur, is as follows; but in this case I would observe, it is preferable to use, instead of wool properly so called, in the manufacture of these fulled stuffs, alpaca, cashmere, gingerline, or other similar wools which have naturally wavy hairs, contrary to wool which is smoother.