'60. The shoe should remain on the hoof about twenty-eight days; but if it wears out before this period, the next shoe should be made thicker.
'61. Horses employed in hunting, in frost, and in the shafts of carriages, require an artificial stop on the hind-foot, and in some situations on the fore-feet.
'62. Whenever this shoe is employed, it should be turned up on the outside heel, and the horn of the same heel should be lowered.
'60. The horn on the inside heel should be preserved, and the heel of the shoe more or less thick, in proportion to the horn removed on the outside heel.
'64. This shoe, when applied, is generally as high on the inside as on the outside heel.
'65. A bar-shoe is very beneficial where the frog is hard and sound, and where the heels have been much removed to bring the frog in contact with pressure.
'66. The upper part of the bar should rest on the frog, and the part opposite the ground turned up in order to act as a stop.
'67. When this shoe is applied the frog receives pressure, the heels will be expanded, and the muscles and tendons not more stretched than before the heels were lowered.
'68. This shoe may be applied for sandcracks, but no part of it should be supported by the crust opposite the crack.
'69. Where, from bad shoeing, the bars are removed, and corns are produced, a bar-shoe may be employed to prevent pressure opposite to the seat of corn.
'70. Where the sole is too thin at the heels to admit of
