Instead of U9ing cloth, as in Mr. Gunby's patent just described, Mr. Hancock merely hackles or cards the fibres of flax, cotton, etc. by which they are drawn out into layers of a suitable thickness; they are then felted together in a trough of water, and afterwards pressed between cylindrical rollers. Over this fabric, liquid caoutchouc or Indian-rubber is to be spread uniformly by means of a spatula. When the caoutchouc has sufficiently solidified, it is to be again pressed, then receive another coat of the resin, and again pressed.