During the past generation, the appreciation of the relative part played by the stomach and intestines in digestion has completely changed. Our forefathers considered the stomach the all-important organ of digestion and the intestines as scarcely more than a long tube to facilitate absorption and deal properly with waste materials. Their relative values are now exactly reversed in our estimation. The stomach has come to be looked upon as scarcely more than a thin-walled bag meant to hold the food that we take at each meal and then pass it on by degrees to be digested, prepared for absorption and finally absorbed in the intestines. It has comparatively little to do with such alteration of the food as prepares it to be absorbed. Its motor function is much more important than its secretory function and serious stomach troubles are {216} dependent on disturbances of stomach motility. Contractions at the pyloric orifice, that is the passageway from the stomach into the intestines, will cause the retention of food and seriously interfere with health. The dilatation of the stomach for any reason may produce a like result and these are the stomach affections that need special care. If the stomach will only pass the food on properly, the intestines will do the rest. A number of people have been found in the course of routine stomach examinations who proved to have no secretory function of the stomach and yet suffered no symptoms at all attributable to this fact. The condition is well known and is called _achylia gastrica_, that is, failure of the stomach to manufacture chyle, the scientific term for food changed by stomach secretions. Our stomachs are only meant, apparently, to provide a reservoir for food that will save us the necessity of eating frequently during the day, as the herbivorous and graminivorous animals have to do, and enable us to store away enough food to provide nutrition for five or six hours. We thus have the leisure to occupy ourselves with other things besides eating and drinking.