Horses with very hard mouths require the bit with double port, the Chiffney bit, or the plan of putting the curb-chain over the tongue instead of under the chin, which in some prevents what is termed a dead mouth. Letting out the head of the bridle in the middle of a stage, has also considerable effect, as causing the bit and curb-chain to take hold in a fresh place. A check-rein likewise is sometimes put to the middle link of the curb-chain, to retain the bit in the middle of the mouth, and to keep it alive, as it is termed. In hard pullers, moreover, putting the bearing-rein to the _top_, and the coupling-rein to the lowest loop in the bit, creates a counter-action, not only making the bit more severe, but keeping the mouth in play. A hard puller is generally safest, and more in place before the bars than at wheel; for, with a good pair of wheel-horses, leaders are soon checked, and he pulls less with a free than with a slack partner. A coach-horse, if obedient to the hand, cannot well carry his head too high, while a horse that goes with his head down has a mean appearance in harness. The horse, however, that carries his head higher than his partner, should have his coupling-rein uppermost. A coach-horse should not be broken in a fast coach, as in fast work there is no time to try his temper, and to humour him. By being put at first into quick work, many horses get into a habit of cantering, and never trot well afterwards. A kicking wheel-horse should be put on the near side, where he is less liable to be touched by any thing that might annoy him; for, on the off side, throwing the reins on his back, or touching his tail when getting any thing out of the boot, may set him off, and cause mischief.--A kicking leader should have a ring on the reins, for many accidents arise by a leader’s getting a rein under his tail, owing to the want of this. With first-rate coachmen, however, this precaution is the less essential, that they generally have their horses better in hand. With horses very fresh in condition it sometimes happens, especially in a turn, that a wheeler kicks over his trace, and an accident is sometimes the consequence. A light hip-strap prevents this, by taking the trace up with him when he rises. In London, this is particularly useful; for, when horses are turning short, or in a crowd, they frequently have their traces slack, and therefore more easily kicked over. The hip-strap looks slow, but it is safe. COACHMEN.