The good effect which regularity of feeding has on the health of horses is apparently due to the fact that the respective functions of nutrition and excretion readily accommodate themselves to routine, the influence of which on the mind is made manifest by the formation of a habit We know from our personal experience that expectation of food stimulates appetite, and that disappointment at not obtaining it at a particular time has the opposite effect. In both these cases, the influence of the mental impression in all probability is not confined to the appetite, but also extends to digestion. We also find that regularity in going to stool is a valuable preventive to constipation; and that "soliciting nature" has often a good effect when we are suffering from that form of indisposition. The tendency which the excitement of hearing the music of the hounds or seeing a racecourse has to make, respectively, a hunter or a racehorse dung more or less loosely, is a good instance of the strong influence which the equine mind has on the equine body.