The subject is so vast that a certain amount of abruptness is necessary in the presentation. Some of the minor non-gastric diseases with gastric symptoms may be omitted. The question is a study in etiology. In one sense it may be said the account is to include gastric disorders which are secondary to other diseases. It is not to gastric disorders, but to diseases, remote from the stomach, which have gastric symptoms, that we call attention. Strictly speaking, the gastric symptoms are not due to any organic disease of the stomach; but such division is largely arbitrary. No pronounced gastric symptoms are liable to prevail without either irritation, congestion or inflammation, whether the symptoms are temporary or permanent.
It is understood, then, that the ailments considered are those which have for their chief, and for the time dominant, expression, gastric symptoms; it is the class to which, in loose terms,