The man holding the longeing-rein should have a light and easy hand. For the first two or three days the horse must not be urged too much; if he goes gently, without jumping or resisting, enough is accomplished. He should be longed to the right, left, and right again, changing from a walk to a trot and back again in each case. He should be frequently halted by gently feeling the rein and speaking to him. After a few days of the above practice the horse may be urged a little more in the trot, but the greatest care and attention are requisite to teach him the use of his limbs without straining him. Much harm may be done in this instruction by a sudden jerk or too forcible pull of the longe. Care must be taken that the lessons are not made so long as to fatigue or fret the horse. At first they should be short and be gradually increased in length as the instruction progresses. At the conclusion of each lesson the horse should be led to the centre of the ring and made much of. The man holding the longeing-rein should take it short in one hand, at the same time patting and rubbing the horse about the head and neck with the other; he should then try to bend the horse's neck a little to the right and then to the left by means of the longeing-rein. The bend should be in the very poll of the neck, and this exercise should be repeated at the end of every lesson, cautiously and by slow degrees, until the horse responds easily. This exercise will greatly facilitate the future instruction of the animal. The running-rein is of great value in teaching a horse to keep his head in a proper position, and affords valuable aid in his first handling. If judiciously used, it saves the rider a great deal of trouble and the horse much ill usage. It is especially useful in controlling horses that are inclined to bolt. It should act directly on the snaffle-bit itself, and is wholly independent of the reins. The =Running-rein= consists of three parts--the chin-strap, martingale, and rein. The _Chin-strap_, about six to eight inches long, on which is suspended a loose ring, is fastened to both snaffle-bit rings. The _Martingale_ has only one ring; the loop through which the girth passes is made adjustable by a buckle. The martingale is so adjusted that when taut the ring will be on a level with the points of the horse's shoulders. The _Rein_ is about eight and one half feet long; one end is buckled into the near pommel-ring; the free end is then passed through the martingale-ring from rear to front, thence through the chin-strap ring from left to right, thence through the martingale-ring from front to rear, and is held in the rider's right hand. A pull on this rein will act directly on the mouth-piece, drawing it back and somewhat downward toward the horse's breast-bone. PREPARATORY LESSON TO MAKE THE HORSE TRACTABLE.