File:The Horse - its treatment in health and disease, with a complete guide to breeding, training and management (1905) (14763785632).jpg

Identifier: horseitstreatmen01axej (find matches)
Title: The Horse : its treatment in health and disease, with a complete guide to breeding, training and management
Year: 1905 (1900s)
Authors: Axe, J. Wortley
Subjects: Horses
Publisher: London : Gresham
Contributing Library: Webster Family Library of Veterinary Medicine
Digitizing Sponsor: Tufts University

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he parts belowthe weight. The same parts of the limb also afford an illustration of alever of the second class ivheji the foot is on the ground (fig. 24). In thisinstance the point of the hock is the part on which the power acts, theground is the fulcrum, and the weight is at the hock-joint. The third order of lever is represented in the fore-arm (fig. 25), where thefulcrum is at the elbow-joint, the power is the biceps muscle, which is insertedjust below the elbow in front, and the weight is the parts of the limb below. It will be seen by an examination of these illustrations, that in levers ofthe first and third class, or levers of speed, the power-arm is shorter thanthe weight-arm, while in those of the second order the length of the formerexceeds that of the latter. Bones which act as levers of the first class when the foot is off theground, become levers of the second kind when the foot is on the groundthe fulcrum and the weight having now become displaced. THE BONES AS LEVERS 35
Text Appearing After Image:
36 CONFORMATION AND ITS DEFECTS HEAD AND NECK If there is any part of the horse which can be regarded as of exceptionalimportance it is the head, for besides being the centre of intelligence,it is also the seat of vice. Moreover, it is the dial-plate on which wefind the outward expression of the inward temperament in all its variedmoods. It forms, besides, the boundary walls of the most importantcavities in the body, notably, the cranium or brain-case, the orbitscontaining the eyes, the nostrils, and the mouth. From these considera-tions it becomes obvious that if the several organs with which the headis connected are to perform their respective functions efficiently, amplespace must l)e provided by the bony framework for their accommodationand unrestrained action. Moreover, the head is not altogether uncon-nected with locomotion, inasmuch as important muscles extending fromthe arm upward along the neck are ultimately connected with it, andare the chief agents in raising and advancing

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