The habit of drinking two glasses of water upon first arising, and six more during the day is an important one. * * * * * [Sidenote: Frequency of Meals] There is no doubt but that a large number of people overload the digestive organs. This, as well as the bolting of food, insufficiently masticated, cannot be too strongly denounced. _All food should be chewed to a pulp before swallowed._ As a relief from overeating, many theorists are advocating two meals a day, but the work of the average man is planned into morning and afternoon sessions, and the three meals have been arranged accordingly. Where two meals a day are eaten, the first meal should be at nine or ten o’clock in the morning and the second meal at five or six o’clock in the afternoon; whereas, for the average person who eats two meals a day, the custom is to go without food until the midday meal, and then to eat two meals within six hours, with nothing more for eighteen hours. The argument in favor of two meals a day has been that the digestive system is inactive during sleep, and, therefore, the system is not ready for a meal upon arising, but the latest experiments (Pawlow) show that digestion continues during sleep, though less actively. It must be borne in mind that the average evening meal is eaten about six o’clock and that there are about four waking hours between this meal and the sleep period; also, that the average individual is awake and moderately active an hour before the morning meal. This gives five waking hours between the evening and the morning meal. About the same time, five hours, elapses between the morning and the midday meal, and between the midday and the evening meal, so that three meals a day divide the digestion periods about evenly. More frequent meals, served in lighter quantity, with greater regularity, so that the system is not overloaded at any one meals, is rational for delicate, or undernourished nerves and tissues. The little child is fed regularly every three hours. * * * * * [Sidenote: Effect of Exercise and Breathing upon Digestion] Daily exercise and the habit of full breathing are absolutely necessary that the waste of the system may be fully liberated, that the nourishment may be carried freely to every tissue, and that sufficient oxygen may be carried through the blood to oxidize the waste, or, to put it into condition to be thrown off. The necessity of oxygen as food is evident. The body will subsist about forty days upon the food stored within it, without re-supply, but it can endure only a few seconds without oxygen, because heat, occasioned by the union of oxygen with carbon and hydrogen, is necessary to keep up the physical activity termed “life.” _The necessity of habits of full, correct breathing cannot be too fully emphasized._ The quantity of oxygen, daily consumed, should fully equal the sum of all other food elements.[6]