The color is not material, provided it be not pied or mealy. No better color for horses can be found than the dark bay or brown, with black mane, tail, and legs. But most of the other colors are frequently found with the best horses. Hard-mouthed horses, when accompanied with great spirit, are objectionable, as they require peculiar bitting and the utmost vigilance. The paces and action of a horse are important, for if good they give a much greater capacity for performance. Some of these depend on form and structure, and are unchangeable; others are the result of breaking. All horses should be taught to walk fast, as it is their easiest and most economical pace, and it will help them over a great deal of ground in a day, even with a heavy load, and with comparatively little effort. A horse that steps short and digs his toes into the ground, is worthless as a traveller, and suited only to a ferry-boat or bark-mill. It is important that a horse be good-tempered. If inclined to viciousness, he should be gently yet firmly managed when it is first apparent. A resort to great severity will be justified, if necessary to conquer him; for if once allowed to become a habit, it will be difficult to cure him. Grooms and mischievous stable-boys, frequently do much injury by their idle tricks with horses; and when detected, they should be discharged at once. Some horses are nervous, easily excited, and start at every unusual noise or object. Others are restive and fretful, and ever anxious to be on the move. Kindness, and firm, yet mild treatment, by which their motions and will are at all times controlled, and their confidence secured, are the only remedies. Others are inclined to sluggishness. These should have stimulating food, and never be overloaded or overworked, and then kept well to their paces. Whatever they are capable of performing, can be got from them in this way only. Habit has great influence with animals, as with man; and when within the compass of his ability, he may be habituated to any reasonable physical exertion. Breeding. Agreeably to the general principles before enumerated, such animals should be selected, as most eminently possess those points which it is desired to propagate, and these, they should not only exhibit in themselves, but should inherit as far as possible, from a long line of ancestry. For the perpetuation of particular points in progeny, it would be safer to rely on the latter quality than the former.