There are pathological conditions under which eating is impossible. Such conditions as cancer of the stomach, destruction of the stomach by acids, and by other causes, renders it no longer possible to take food. Persons in this condition often go for extended periods without food, before they finally die. A few such cases will be mentioned in the text as we proceed with our studies. In certain conditions of gastric neurosis food is vomited about as fast as it is swallowed, or it is passed into the small intestine with almost equal rapidity and hurried to the exit and expelled without being digested. Such an individual, though eating, is to all practical purposes, going without food. Such a state of affairs may last for an extended period.