It is easy to overestimate the importance of diet in relation to asthma. While it is true that in many subjects attacks occur apparently quite independently of dietetic conditions, it is equally true that many attacks of asthma are brought on by indigestion. Any food that appears to the patient to cause indigestion must be avoided, and in regard to this the patient is often in the best position to express an opinion as to indigestible foodstuffs. Such patients usually learn by experience what they should and what they should not eat and drink. We meet with peculiar idiosyncrasies as to diet in these cases, some article of food, in itself of a very digestible nature, readily inducing an attack. The dietetic treatment consists in recommending a simple, wholesome, and well-cooked regime, simplicity being attained by cutting off many of those " extras " in a mixed diet which healthy subjects may take with impunity, but which are injurious to weakly individuals. As a rule a plain, mixed diet is the best, made up of the lighter and more easily digested protein and carbohydrate foods. Such articles of diet as pork, rich sauces, heavy cakes, pastry, dried fruits, nuts, pickles, and in some instances cheese, should be avoided; the lightest vegetables only should be taken, such as spinach, cauliflower tops, asparagus, baked potatoes, and tomatoes; all rich wines should be withheld. A heavy meal in the morning should be avoided, the chief meal of the day being taken in the middle of the day. Alcohol as a rule should be avoided entirely, because of the risk of the alcoholic habit. While a simple, mixed diet, in which there is no excess of protein, carbohydrates, or fat, is usually the best diet for this condition, cases are met with which undoubtedly do better on a largely meat diet or a modified Salisbury regime (p. 534); others again are met with in which greater freedom from attacks follows on a diet of a more or less strict vegetarian character. Every case has to be carefully studied on its merits in order to learn what food is and what is not injurious to the individual. Some cases are undoubtedly of gouty origin, and require the general and dietetic treatment appropriate to that condition. In all cases constipation must be avoided. It is well to keep in mind that some asthmatic patients unduly restrict their diet, to the detriment of their general health, without any appreciable gain from the point of view of the asthma.