Crib-biting has, in submission to general opinion, been alluded to as a habit, learned within the stable. But may not that which man designates a habit in a dumb creature, be no more than the influence of one atmosphere acting similarly on two bodies, both caged in the same stable? The air is much more than inhaled. A large quantity is swallowed with the saliva. No slight amount is deglutated with the masticated food. The water is generally kept in the stable some hours before the horses are permitted to imbibe it. Water has a large affinity for atmosphere. Air, therefore, enters largely into the body, besides being continually absorbed by the blood during respiration. And moreover, is it not strange that all horses, when indulging an imitative faculty, should always precede the display by the same licking of the manger, which assuredly is not learned, because that stage has passed before the young horse is placed near the one it is supposed to imitate? Is it not also surprising, that applying the tongue to cool substances should, in other domesticated but dumb creatures, be a symptom of derangement of the stomach? When the horse cribs, the manger is not bitten. The upper incisors are merely placed against the wood-work, and, from this fixed point, the animal strains backward the body; thereby, the muscles of the neck are the more readily excited, and a small portion of air, accompanied by a slight sound, is forced up a canal which does not of itself favor regurgitation. When the inability to vomit is considered, the necessity of some such stratagem, to relieve the stomach of its burning acidity, must at once be admitted. We are still further reconciled to the necessity which prompts the action, when the ease afforded to human dyspeptic subjects, by the expulsion of "the wind," is properly regarded. To relieve crib-biting, first attend to the atmosphere of the stables; render that pure by ample ventilation. Place a lump of rock-salt in the manger; should that not effect a cure, add to it a large piece of chalk; should these be unavailing, always damp the food, and, at each time of feeding, sprinkle magnesia upon it, and mingle a large handful of ground oak-bark with each feed of corn. Should none of these measures prove beneficial, treat the case as one of =chronic indigestion= or =gastritis=.