The grown person, pursuing the ordinary sedative occupation, should not eat more than three or four ounces of cereal food a day, while the manual laborer should not consume more than five or six ounces each twenty-four hours. This quantity contemplates cool, or winter weather. In summer this quantity should be reduced according to work or activity. (2) GRAIN AS A SOURCE OF NITROGEN Grain as a source of proteid has received undue consideration in hygienic works. Upon an allowance of one-fourth of a pound of grain per day, which would make four vienos, with a nitrogen factor of six, we see that 24 decigrams of nitrogen would be supplied from the grain. The variations between the proteids contained in two varieties of breakfast food is seldom more than two or three per cent. This would amount to a variation in the daily intake of nitrogen of about five decigrams, an amount too little to be worth consideration. [Sidenote: Digestibility of grain proteids] Grain proteids are not so easily digested as are the proteids of eggs, milk and nuts. The following list of grains and grain products is given in the order of the digestible nitrogen they contain: 1 Gluten or dietetic foods 2 Barley 3 Macaroni 4 White flour 5 Whole wheat--Graham flour 6 Rye 7 Oatmeal 8 Corn products 9 Buckwheat 10 Rice 11 Pure starches (3) GRAIN AS A REMEDIAL FOOD [Sidenote: Remedial value of the whole grain] [Sidenote: Wheat bran a natural remedy for constipation] Grain is constipating or laxative in effect according to the way it is prepared and eaten. Whole grain, especially wheat and rye, will normalize intestinal action, and in some cases act as a laxative, while the same grains made into flour, and milled in the usual way, are constipating. Ordinary wheat bran is one of the most effective remedies known for intestinal congestion, and it can be administered or regulated with much accuracy, according to the severity of the case. An intelligent understanding of the use of bran in treating constipation is quite necessary. The object should be to employ bran as a remedy in chronic cases, and to vary the quantity, the quality, and the cellulose content of the meals. In rare cases, bran may produce irritation; in such cases it should be cooked three or hours, and eaten only with hot water. In other cases the mechanical stimulation of the peristaltic action is not effective. The practitioner can usually determine these questions on the third or the fourth day. Bran should be administered about as follows: In cases of severe constipation, one rounding tablespoonful in water, just after rising; one-half teacupful, cooked, taken at each meal, and a heaping tablespoonful in water just before retiring. The following table gives, in the order of their laxative effects, a few of the principal grains: 1 Flaked or whole rye 2 Flaked or whole wheat 3 Flaked or whole barley 4 Flaked or whole oats NUTS