. L'art de la raquette : un manuel pour les amateurs . FiO, 4.—Section transversale de Wau, montrant la variation de l'épaisseur. FORME ET ACTION DU PIED. La structure de la paroi est fibreuse, les fibres allant de j^arallel les unes aux autres, et avec la même obli-quité que celle présentée par l'avant du valLAlbien que la paroi varie en épaisseur de l'avant vers l'arrière, elle ne va pas du haut vers le bas. Il atteint la même épaisseur du couronnement à sa circonférence inférieure. Les couches de la paroi sont plus dures à l'extérieur, devenant plus douces à l'approche de la surface interne—acondition due à l'extérieur

• Contributeur: Reading Room 2020 / Alamy Banque D'Images
• ID de l’image: 2CGGT2N
• Taille du fichier: 7,2 MB (365,9 KB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 1471 x 1700 px | 24,9 x 28,8 cm | 9,8 x 11,3 inches | 150dpi

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. The art of horse-shoeing : a manual for farriers . Fio, 4.—Transverse Section of WaU, showing variation in thickness. FORM AND ACTION OF THE FOOT. The structure of the wall is fibrous, the fibresrunning j^arallel to each other, and with the same obli-quity as that presented by the front of the walLAlthough the wall varies in thickness from before back-wards, it does not from above downwards. It main-tains the same thickness from the coronet to its lowercircumference. The layers of the wall are hardest externally, becoming softer as they approach the inner surface—acondition due to the outer layers being exposed to fric-tion and evaporation. This is a simple and valuableprovision of nature which should not be interfered with.The hard outer layer is best adapted to withstand wear, and its density protects the deeper layers from evapora-tion. This maintains the whole wall at the degree ofsof iness and toughness which best preserves elasticity andstrength of horn.. • Fig. 5.—The Sole with Frog removed. The Sole is that division of the hoof which formsthe floor of the foot. It is situated within the lower 10 THE ART OF HORSE-SHOEING. border of tlie wall, and is slightly arched, so that on ahard, level surface, its central part takes no bearing.(Fig. 5.) Posteriorly the sole is divided by a triangularspace into which the frog fits, and thus its continuationto the heels consists of two angular portions embracedbetween the bars and the wall. The unmutilated sole isthroughout of nearly equal thickness, but a slight excessround the circumference gives firmer attachment to thowall. The inner surface presents a. finely pitted appearance, which is most marked at the toe and round its border.The part immediately related to the frog shows feAV pits, and we shall find that the whole surface corresponds tothe sensitive parts to which it is attached. The structure of the sole is, like the wall, fibrous;but the fibres are smaller. They run downwards andforwa

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