THE PHENOMENA OF MUSCLE AND NEKVE. 

 FIG. 13. 



61 



Diagram illustrating Apparatus arranged for Experiments with Muscle and Nerve: A. The 

 moist chamber containing the muscle-nerve preparation. The muscle m, supported by the clamp 

 cl., which firmly grasps the end of the femur/, is connected by means of the S-hooks and a thread 

 with the lever /, placed below the moist chamber. The nerve n, with a portion of the spinal col- 

 umn ri still attached to it, is placed on the electrode-holder el, in contact with the wires x, y. The 

 whole of the interior of the glass case gl, is kept saturated with moisture, and the electrode-holder 

 is so constructed that a piece of moistened blotting-paper may be placed on it without coming 

 into contact with the nerve. - 



B. The revolving cylinder bearing the smoked paper on which the lever writes. 



C. Du Bois-Reymond's key arranged for short-circuiting. The wires x and y of the electrode- 



