In this process there are five stages. The _saccharine_, by which the starch and gum of the vegetables, in their natural condition, are converted into sugar; the _vinous_, which changes the sugar into alcohol; the _mucilaginous_, sometimes taking the place of the vinous, and occurring when the sugar solution, or fermenting principle is weak, producing a slimy, glutinous product; the _acetic_, forming vinegar, from the vinous or alcoholic stage; and the _putrefactive_, which destroys all the nutritive principles and converts them into a poison. The precise point in fermentation when the food becomes most profitable for feeding, has not yet been satisfactorily determined; but that it should stop short of the putrefactive, and probably the full maturity of the acetic, is certain. The roots for fattening animals ought to be washed, and steamed or boiled; and when not intended to be fermented, the meal may be scalded with the roots. A small quantity of salt should be added. Potatoes are the best roots for swine; then parsnips; orange or red carrots, white or Belgian; sugar beets; mangel-wurzel; ruta-bagas; and the white turnips, in the order mentioned. The nutritive properties of turnips are diffused through so large a bulk, that we doubt if they can ever be fed to fattening swine with advantage; and they will barely sustain lift when fed to them uncooked. There is a great loss in feeding roots to fattening swine, without cooking. When unprepared grain is fed, it should be on a full stomach, to prevent imperfect mastication, and consequent loss of the food. It is better indeed to have it always before them. The animal machine is an expensive one to keep in motion, and it should be the object of the farmer to put his food in the most available condition for its immediate conversion into fat and muscle. Swine ought to be kept perfectly dry and clean, and provided with a warm shelter, to which they can retire at pleasure. This will greatly hasten the fattening and economize the food. They thrive better and are generally less subject to disease, when long confined in yards, by having a clear running stream always accessible, to wallow in. This is one of the best preventives of vermin and cutaneous diseases. A hog ought to have three apartments, one each for sleeping, eating, and evacuations, of which the last may occupy the lowest, and the first the highest level, so that nothing shall be drained, and as little carried into the first two as possible. They must be regularly fed three times a day, and if there is a surplus, it should be removed at once. If they are closely confined in pens, give them as much charcoal twice a week as they will eat. This corrects any tendency to disorders of the stomach. Rotten wood is an imperfect substitute for charcoal.