It is advisable that patients who are much troubled by this symptom of intestinal indigestion should avoid the foods which are most liable to be decomposed in this manner. In particular, the amount of carbohydrate foods should be reduced to a minimum until the normal condition is recovered. There is, however, a great difference in the effects of carbohydrates. The sugar of milk is very prone to undergo decomposition, being transformed into lactic acid, and the latter into butyric acid, hydrogen, and carbonic-acid gas. Cane-sugar (ordinary loaf or granulated sugar) gives rise to the same acids and gases. But the carbohydrates which are usually eaten in the greatest amount, and are the most troublesome in this respect, are bread, potatoes, puddings, legumes, cauliflowers, cabbage, etc. A large proportion of these substances, before they are completely digested, is carried far down into the ileum, where the alkaline secretions and slower peristaltic movement are favourable to the growth of bacteria and decomposition of food. Rice, sago, tapioca, and arrowroot, on the other hand, are more rapidly digested, and to a great extent are absorbed in the upper reaches of the bowel, and flatulence does not rise from them to the same degree. The best treatment, therefore, is to stop all forms of carbohydrates for a few days, and during this period allow only meat, fish, or fowl, with some light vegetable such as boiled lettuce, spinach, or onion, a jelly, and some hot water to drink, After a period of five to seven days we may add boiled rice, next a pudding of rice, sago, or tapioca, crisp dry toast, or a rusk. Bread and potatoes should be avoided for a few weeks; and all stringy, fibrous, or flatulent vegetables, such as cabbage, turnips, or Jerusalem artichokes, may have to be permanently left out of the diet.