_Suggestion and Seasickness_.--Seasickness illustrates the place of unfavorable suggestion in digestion. The nausea, consequent upon the movement of a vessel at sea, is due to a disturbance of the circulation within the skull, and particularly of the circulation in the semi-circular canals. The organ of direction of the body is disturbed by the over-function demanded of it, consequent upon the continuous movement of the vessel. This is, however, only a predisposing element. A strong additional factor is the firm persuasion many people have that they will suffer from nausea and seasickness, and the unfavorable expectancy thus aroused. Most people have to give their dole to Neptune. Those who for weeks before have been expecting and dreading it usually pay a heavy tribute. Probably the best remedy for seasickness is the suggestion that there is no necessity for losing more than a meal or two, if even that much, provided there is simplicity of diet and proper predisposition of body by gentle opening of the bowels, and lack of the over-feeding that sometimes comes from dinners given before departure. I have known many people who, after suffering severely not in one but in many voyages, have, by means as simple as this, been saved from days of seasickness even in rough weather. Most of the cures for seasickness that have been suggested have depended principally on the suggestive element. For instance, there is no doubt that many people are relieved by wearing dark glasses, and this remedy does good for train sickness and other afflictions of a similar kind. There is, however, no good physical reason why wearing dark glasses should help except through their constant physical suggestion. A simple remedy that has helped many through seasickness is the wearing of a sheet of glazed paper, usually some heavy writing-paper, immediately over the skin of the abdominal region. This of itself has no physical effect, but the sensation of its presence constantly obtrudes itself, and by making people feel that they must be better because a great many other people have declared that they were bettered by this remedy, they actually suffer less from nausea and vomiting. Many of the internal remedies employed for seasickness are directed to the stomach and intestines. {98} As the seat of the difficulty is not here but within the skull, the reputation which these remedies have acquired has been due largely to the suggestive effect of taking them rather than to any physical qualities they possessed, though of course they have served to set at rest stomachs disturbed by unfavorable expectancy.