The Wall 50-53 The Bars 51, 52 The Layers of the Wall: 1. The Periople. 2. The Middle or Protective Layer. 3. The Leafy Layer (Keraphyllous Layer) 53-55 The Sole 55, 56 The Frog 57, 58 The Minute Structure of the Horn 58 Hard and Soft Horn 59 CHAPTER II. THE FOOT IN ITS RELATION TO THE ENTIRE LIMB. =A. Standing Positions of the Limbs= 62 (_a_) THE POSITIONS OF A FORE-LIMB VIEWED FROM IN FRONT AND IN PROFILE 62-67 (_b_) THE POSITIONS OF A HIND LIMB VIEWED FROM BEHIND AND IN PROFILE 67-69 =B. Forms of Feet, viewed from in Front, from Behind, and in Profile= 69-72 =C. Lines of Flight of Hoofs in Motion= 72-75 =D. Influence of Weight upon Lines, of Flight of Hoofs= 75, 76 =E. Forms of Hoofs= 77 The Hoof of the Regular Position—The Hoof of the Base-Wide Position—The Hoof of the Base-Narrow Position—Forms of Hind Hoofs— The Wide and the Narrow Hoof—The Characteristics of Healthy Hoofs 77-82 =F. Growth of the Hoof and Wear of the Hoof and Shoe= 82-86 =G. Physiological Movements of the Hoof= 86-89 PART II.