The horse is now exercised in the riding-hall or open manège, the lessons for young horses not exceeding three quarters of an hour. The horse is ridden on the track first at a walk, then at a slow trot, and afterwards the trot and walk are alternated, care being taken to turn the corners squarely; the horse is next marched to the right and left, halted and reined back to accustom him to obey the bit and the pressure of the legs. When he is obedient to the snaffle, the horse is equipped with the curb-bit. The bit must have rings at the ends of the mouthpiece for snaffle-reins, or a bit-bridoon must be used in order that the horse may be accustomed by degrees to the action of the curb-bit. The first instruction given to the horse with the curb-bit is bending the neck and reining in, dismounted; he is then mounted and exercised in the riding-hall or open manège as before described, and receives the bending and reining lessons mounted. BENDING LESSONS, MOUNTED. The horse is now equipped with a curb-bridle. =To Bend the Horse's Neck to the Right.=--Adjust the reins in the left hand; seize the right rein with the right hand well down; draw it gently to the right and rear until the horse's head is brought completely around to the right, in the same position as in the bend dismounted. When the horse champs the bit, make much of him, and allow him to resume his natural position. The horse's neck is bent to the left in a similar manner. =To Rein in.=--Lower the bridle-hand as much as possible, turning the back uppermost; with the right hand, nails down, take hold of the curb-reins above and close to the left hand and shorten them by degrees, drawing them through the left hand, which closes on the reins each time they are shortened. When the horse resists much and holds his nose up, keep the reins steady; do not shorten or lengthen them; close the legs to prevent the horse from backing; after remaining perhaps a minute or more with his nose up and his jaw set against the bit he will yield, bring his nose in, and champ the bit; make much of him, loosen the reins, and after a few seconds _rein in_ again. This exercise gives the horse confidence, and teaches him to arch his neck and bring his head in proper position whenever he feels the bit. Most young horses are afraid of the bit, and they must never be frightened by sudden jerks on the reins, lest they should afterwards refuse to stand the requisite pressure of the bit. A certain amount of bearing is necessary to induce the horse to work boldly and well, as well as to apprise the rider of what the horse is going to do. In reining in, some horses rest the lower jaw against the breast; to counteract this, press both legs equally and force the horse forward to the bit. Some horses will not work up to the hand; that is, will not bear the bit at all. Such horses are unfit for the service.