Mutton-suet is used in the manufacture of common _candles_, with a proportion of ox-tallow. Minced suet, subjected to the action of high-pressure steam in a digester, at two hundred and fifty or two hundred and sixty degrees of Fahrenheit, becomes so hard as to be sonorous when struck, whiter, and capable, when made into candles, of giving very superior light. _Stearic candles_, the invention of the celebrated Guy Lussac, are manufactured solely from mutton-suet. Besides the fat, the intestines of sheep are manufactured into various articles of luxury and utility, which pass under the absurd name of _catgut_. All the intestines of sheep are composed of four layers, as in the horse and cattle. The outer, or _peritoneal_ one, is formed of that membrane, by which every portion of the belly and its contents is invested, and confined in its natural and proper situation. It is highly smooth and polished, and secretes a watery fluid which contributes to preserve that smoothness, and to prevent all friction and concussion during the different motions of the animal. The second is the _muscular_ coat, by means of which the contents of the intestines are gradually propelled from the stomach to the rectum, thence to be expelled when all the useful nutriment is extracted. The muscles, as in all the other intestines, are disposed in two layers, the fibres of the outer coat taking a longitudinal direction, and the inner layer being circular--an arrangement different from that of the muscles of the [oe]sophagus, and in both beautifully adapted to the respective functions of the tube. The _submucous_ coat comes next. It is composed of numerous glands, surrounded by cellular tissue, and by which the inner coat is lubricated, so that there may be no obstruction to the passage of the food. The _mucous_ coat is the soft villous one lining the intestinal cavity. In its healthy state, it is always covered with mucus; and when the glands beneath are stimulated, as under the action of physic, the quantity of mucus is increased; it becomes of a more watery character; the contents of the intestines are softened and dissolved by it; and by means of the increased action of the muscular coat, which, as well as the mucous one, feels the stimulus of the physic, the fæces are hurried on more rapidly and discharged.