File:The Horse - its treatment in health and disease, with a complete guide to breeding, training and management (1905) (14577653017).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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ompara-tively slow in their movements however great may be their strength; and,conversely, horses whose legs are relatively long, and whose range of actionis necessarily more considerable, will be capable of developing a muchhigher rate of speed. The draught-horse and the race-horse afford typicalexamples of the truth of the proposition that the volume of the musclesgives the measure of force, their length that of speed . In choosing theone, therefore, the highest muscular develojniient consistent with reasonableactivity in the slower paces should be sought for, while in the other thefirst and most important requirement is ample length of the leg muscles inparticular, combined with just so much thickness as will yield the necessarypower by which to support the weight and endure the strain that may beimposed upon them. Any surplus muscle over and above these require-ments will augment the weight, and tend rather to retard than to increasethe velocity of the gait. THE BONES AS LEVERS 33
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Fig. 20.—Lever of the First Order THE BONES AS LEVERS The muscles concerned in locomotion are each, with few exceptions,attached to two bones, either directly, or through the medium of tendons.The bones connected by their extremities form a series of free-movingjoints, and being thus enabled to moveone upon the other, constitute so manybony levers by which the movementsof the body are effected. A lever is a rigid and inextensiblel)ar used for the purpose of movingbodies l)y means of a power or weighteither greater or less than that of tliebodies themselves. When a bone is operating as alever, one end is more or less fixedand made to moAe upon tlie corre-sponding surface of the l)one withwhich it is articulated, and thus per-forms the office of fulcrum, while the other portion is left free to move inobedience to the power and the weight. A lever presents for considera-tion three elements, viz. the Fulcrum, the Power, and the AVeight, therespective positions of which<letermine the

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