The eating or drinking by the subject, just before the seance, of anything that will leave a pronounced taste in the mouth, will make hypnosis more difficult. On the other hand, with some persons, especially those who cannot grasp the idea of hypnosis, it is a good plan to give them a very small drink (a brandy glass) of sweetened water containing a few drops of essence of orange and tell them: "This is not a narcotic, it is simply orange water, but it will help you go to sleep." In this way the very delicate flavor of the orange helps to keep up the suggestion of sleep, utilizing the sense of taste for that purpose.