26 



PHYSIOLOGY OF MUSCLES AND N'ERVES. 



Experiments in muscular elasticity may also be made 

 with the apparatus briefly described above, by measuring 

 the extensions of the muscle by the variations of a lever 

 attached to it. The easiest way to do this is by fasten- 

 ing an indicating apparatus to the lever in such a way 



Fig. 8. Simple myogi£Aph, 



that it traces the movements of the lever on a plate of 

 smoked glass placed in front of it. This apparatus is 

 called a myograph, or muscle-writer. Fig, 8 represents 

 it in the simplihed form adopted by Pflliger. The body, 

 the elasticity of which is to be examined, is firmly fixed 



