. A text-book of horseshoeing, for horseshoers and veterinarians . the descent and pressure of the OS pedis sinks a^^- ^°- little—that is, the arch of the sole becomessomewhat flattened. Allthese changes are muchmore marked uponsound unshod hoofs, be-cause in them the re-sistance of the earthupon the sole and frogis pronounced and com-plete. These changes inform are more markedin front feet than inhind. In defective anddiseased hoofs it may happen that at the moment of greatestweight-bearing, instead of an expansion a contraction mayoccur at the plantar border of the quarters. Three highly ela
. A text-book of horseshoeing, for horseshoers and veterinarians . the descent and pressure of the OS pedis sinks a^^- ^°- little—that is, the arch of the sole becomessomewhat flattened. Allthese changes are muchmore marked uponsound unshod hoofs, be-cause in them the re-sistance of the earthupon the sole and frogis pronounced and com-plete. These changes inform are more markedin front feet than inhind. In defective anddiseased hoofs it may happen that at the moment of greatestweight-bearing, instead of an expansion a contraction mayoccur at the plantar border of the quarters. Three highly elastic organs there are which play the chiefpart in these movements,—namely, the lateral cartilages, theplantar cushion, and the horny frog. Besides these structures,indeed, all the remaining parts of the horn capsule, especiallyits coronary border, possess more or less elasticity, and con-tribute to the above-mentioned changes of form. In order to maintain the elastic tissues of the foot in theirproper activity, regular and ahundant exercise^ with protection. Vertical, transverse section of a foot seen from behind:A, OS coronse; B, os navicularis; C, os pedis; a, lateralcartilage; b, anterior portion of fleshy frog; c, section ofperforans tendon; rf, suspensory ligament of the navicu-lar bone; /, wall; m, sole; ?;, white line; o, frog. HORSESHOEING. 89 against drying out of the hoof, are absolutely necessary, becausethe movements of the different structures within the foot andthe changes of form that occur at each step are indispensable inpreserving the health of the hoof. Long-continued rest in thestable, drying out of the hoof, and shoeing decrease or alter thephysiological movements of the foot, and these lead under cer-tain conditions to foot diseases, with which the majority ofhorse oivners are entirely unacquainted. As an outward, visible indication of the mobility of thequarters upon the shoe we may point to the conspicuous, brightlypolished, and often sunken spots,
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherphila, bookyear1913
