In the investigations that we have performed ourselves, we were more interested in studying the effect of the saline waters on the general condition of the patient than on the different digestive processes per se. For this reason, we did not undertake to compare the gastric processes on certain days on which sodium chloride was given with the processes on other days on which none of it was given, but we undertook to investigate the problem in a different way, as follows: As soon as the patient came under observation, and before the administration of saline waters was begun, the production of hydrochloric acid was determined. Then Kissingen Rakoczy or Homburg Elizabeth water was administered in the customary way for a certain length of time. At the expiration of a few days a test meal was administered under the same conditions as before, that is, without the simultaneous administration of mineral water, and examined, and such a test was repeated from time to time thereafter. The different patients during this period were instructed to undergo a typical drinking cure, as commonly ordered for the different mineral waters whose effect was being tested.