=Dietary in the Tropics.=—Sir R. Havelock Charles says, “It is impossible to form exact rules for dietary in the tropics because there are differences in climate which require modifications.” He says nothing about limiting the amount of meat, but he does say, “no _cold_ meat whatever should come on the table.” It is important that everything should come straight from the fire to the table. It cannot then cause bacillary mischief, and there should be no fear of cholera or dysentery. Boiled water only should be drunk. No salads of any kind should be used except in the greatest moderation. _Fruit._—Every fruit which possesses a rind that can be removed may be eaten raw with impunity by a healthy man at any time of the year. Fruits which do not possess a rind are incapable of being thoroughly cleansed; such fruit may be contaminated and dangerous to the consumer, and, at any rate, ought only to be eaten after it is cooked. Therefore oranges, grape-fruit, pears, apples, bananas, mangoes, pineapples, custard-apples, mangosteen, tomatoes, etc., may be eaten raw after peeling them. But it would be unsafe to eat grapes, currants, strawberries, and other fruits which cannot be peeled until they are cooked. As regards proteins, some fish, fowl, or meat may be taken for breakfast; animal food ought not to be taken in the middle of the day. It is better to take dinner in the evening. Beef, mutton, pork, kid (goat-flesh), venison (deer and antelope), poultry, many kinds of birds, eggs, and fish are obtainable in one place or another. Tinned meats and fish should be avoided; indeed, the importance of fresh meat is so great that hunting, shooting, and fishing should be strongly recommended as exercise. Fat is obtained in the form of meat, dripping, butter, ghee, nuts, and various oils used in cooking. The pure oil from peanuts, palm-nuts, and cocoanuts is salutary; but many samples are adulterated with sesamé oil, poppy-seed oil, and colza oil, which are deleterious by causing dyspepsia or other gastro-intestinal troubles. These in turn render the subject susceptible to dysentery, sprue, and other tropical disorders. =Food Economics: Regulation of Diet with Reference to Minimum Expenditure.=—The cost of a meal for an individual or a family is made up of two factors—the money cost of the raw materials, and the time, cost of labor, and other expenses required for the preparation and serving of the food. _The Cost of Raw Food Materials._—Meats of all kinds, poultry, and fish are the most expensive articles of diet. Then, too, the waste has to be considered—the bones and legs of a dressed fowl and the bones and skin of fish. At the present time the dairy products supply the cheapest nutriment among animal foods, but the price of butter and eggs are apt to soar enormously during the winter months.