External Seedy-Toe. (_Colonel Nunn_) 131. External Seedy-Toe. (_Colonel Nunn_) 132. A Keraphyllocele on the Inner Surface of the Horn of the Wall at the Toe. (_Gutenacker_) 133. Os Pedis showing Absorption of Bone caused by the Pressure of a Keraphyllocele. (_Gutenacker_) 134. Foot with Canker of the Frog and Heels. (_Gutenacker_) 135. Foot with Canker extending to the Wall. (_Malcolm_) 136. Foot with Advanced Canker. (_Gutenacker_) 137. Feet affected with Specific Coronitis. (_Taylor_) 138. Fore-foot with Specific Coronitis. (_Taylor_) 139. Excision of the Lateral Cartilage (Old Method). (_Gutenacker_) 140. Excision of the Lateral Cartilage. (_After Moller and Frick_). (_Gutenacker_) 141. Excision of the Lateral Cartilage. (_After Bayer_.) (_Gutenacker_) 142. Partial Excision of the Lateral Cartilage 143. Ossified Lateral Cartilages, or Side-bones. 144. Smith's Side-bone Saw (Old Pattern). 145. Smith's Side-bone Saw (Improved Pattern). 146. Smith's Hoof Plane. 147. Hodder's Hoof Chisel. 148. Foot showing the Grooves made in Smith's Operation for Side-bones (viewed from the Side). 149. Foot showing the Grooves made in Smith's Operation for Side-bones (viewed from Below). 150. Periostitis involving the Pedal and Navicular Bones. (_Litt_) 151. Periostitis involving the Pedal and Navicular Bones. (_Litt_) 152. Effects of Periostitis on the Os Pedis. (_Smith_) 153. Effects of Periostitis on the Os Pedis. (_Smith_) 154. Effects of Periostitis on the Os Pedis. (_Jones_) 155. Effects of Periostitis on the Os Pedis. (_Jones_) 156. Case of Buttress Foot. (_Routledge_) 157. Foot showing Fracture of the Pyramidal Process in a Case of Buttress Foot. (_Routledge_) 158. Fracture of the Os Coronæ. (_Crawford_) 159. Fracture of the Os Coronæ. (_Crawford_) 160. Fractured Os Pedis. (_Freeman_) 161. Navicular Bone showing Lesions of Navicular Disease. (_Gutenacker_) 162. Foot with the Seat of Navicular Disease exposed (showing Lesions). (_Gutenacker_) 163. Navicular Bone showing Lesions of Navicular Disease (a Case of Long-standing). (_Gutenacker_) 164. Frog Seton Needle. 165. Diagram showing Course of the Needle in Setoning the Frog. DISEASES OF THE HORSE'S FOOT CHAPTER I INTRODUCTION The importance of that branch of veterinary surgery dealing with diseases of the horse's foot can hardly be overestimated. That the animal's usefulness is dependent upon his possession of four good feet is a fact that has long been recognised. Who, indeed, is there to be found entirely unacquainted with one or other of such well-known aphorisms as: 'Whoever hath charge of a horse's foot has the care of his whole body'; 'As well a horse with no head as a horse with no foot'; or the perhaps better known, and certainly more epigrammatic, 'No foot, no horse.'