PRESUMED CAUSES OF DISEASES On the undisputed authority of physiologists it is known that all diseases are made possible by derangement which is favourable to the propagation of the microbes of disease, or by deposits of inharmonious matter which are not thrown off. Derangement of all the substance of the internal body is effected mainly, and probably entirely, by deposit of indigestible food or of tissue which is broken down and is not thereafter expelled from the system by the ordinary means provided for the discharge of waste. These inharmonious deposits which cause so much direct and indirect trouble are mainly, and probably entirely, the result of excess of eating, or of wrong eating, so that the digestive organs of the body cannot take care of what is forced on them; or, of admitting substances which they are powerless to make into good blood or discharge by the regular means provided by nature. Right eating and right food are, then, the all-important considerations of health, as far as the tissues are concerned; and, as the tissues are themselves the stored food or fuel of the brain and the nerve centres, the importance of perfect nutrition extends to the most vital functions and interests of life. TARDY APPRECIATION All experience warns against overeating and improper eating as the most common causes of disease; and troubles of the stomach and intestines are known to be the parents of all other bodily ills; yet no fixed guide has been set to determine what is "overeating" and what is "improper food." The reason for this is probably because no two bodies require the same quantity or kind of nourishment, and, "What is one man's food is another man's poison." Nature has not been so unkind, however, as to leave man without a means of knowing just how to gauge the quantity of food required for her best service, and probably, when we learn the secret, has equally well provided us with certain discrimination relative to the quality of food that is best for harmonic development. Investigation never fails to find provision for both guard and guide in all of Nature's plans and man's nutrition is of such importance that she surely has not left it out of the list of the protected. Of the power of taste to discriminate accurately in the matter of comparative value of foods I am not sure as yet, although I am confident the power rests somewhere within our reach if we can only discover it; but I have the best evidence possible that taste has the power to advise accurately in the matter of the _kind_ of food and the _quantity_ required; and, having selected what it wants or needs out of a morsel of food, rejects the rest by ceasing to taste. The message or warning which taste gives in connection with eating is, "THAT WHILE ANY TASTE IS LEFT IN A MOUTHFUL OF FOOD IN PROCESS OF MASTICATION OR SUCKING, IT IS NOT YET IN CONDITION TO BE PASSED ON TO THE STOMACH; AND WHAT REMAINS AFTER TASTE HAS CEASED IS NOT FIT FOR THE STOMACH." WHAT SENSE?