The shell of the tortoise, a testaceous animal, used in the fabrication of many articles of ornament and utility. The comb-makers and horn-turners of France, Holland, and Germany, make use of the parings and clippings of horn and tortoiseshell, in the manufacture of snuff-boxes, and a variety of elegant articles and toys. They first soften the material in boiling water, so as to be able to press it into iron moulds, and then, by means of heat, unite them intimately into one mass. Care must be taken that the heat be not so powerful as to scorch the material; and grease must be carefully avoided, as that prevents their union.