General physiology of muscles and nerves . Fig. 7. Du APIARATLS FOU TIIK STUDY OF ELASTIC EX-TENSION IX into 26 PHYSIOLOGY OF MUSCLES AIS^D NERVES. Experiments in muscular elasticity may also be madewith the apparatus briefly described above, by measuringthe extensions of the muscle by the variations of a leverattached to it. The easiest way to do this is by fasten-ing an indicating apparatus to the lever in such a way. Fig. S. Suiple myograph. that it traces the movements of the lever on a plate ofsmoked glass placed in front of it. This apparatus iscalled a myography
General physiology of muscles and nerves . Fig. 7. Du APIARATLS FOU TIIK STUDY OF ELASTIC EX-TENSION IX into 26 PHYSIOLOGY OF MUSCLES AIS^D NERVES. Experiments in muscular elasticity may also be madewith the apparatus briefly described above, by measuringthe extensions of the muscle by the variations of a leverattached to it. The easiest way to do this is by fasten-ing an indicating apparatus to the lever in such a way. Fig. S. Suiple myograph. that it traces the movements of the lever on a plate ofsmoked glass placed in front of it. This apparatus iscalled a myography or muscle-writer. Fig. 8 representsit in the simplified form adopted by Pfliiger. The body,the elasticity of which is to be examined, is firmly fixed ELASTICITY OF MUSCLES. 27 in the vice C, and is connected witli tlie lever E E, thepoint of which touches the plate of smoked glass. The^Yeight of the lever is held in equipoise by the balance11. When ?weights are placed in the scale-pan at F, thelever moves upward, and its point marks a straight linewhich afifords opportunity for measuring the amount ofthe extension. But in whatever way examined, muscle, in commonwith all other soft bodies, exhibits another variationfrom the bearing of rigid bodies. We have seen thatin steel or similar bodies the extension is exactly pro-portionate to the weight applied; that is to say, if agiven steel wire is extended one millimetre by onekilogramme,
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Keywords: ., bookcentury1800, bookd, booksubjectmuscles, booksubjectphysiology
