66 GENERAL PKOPERTIES OF LIVING TISSUES 



17). The screws move into an angle, against the sides 

 of which a large or small rod may be held firmly and 

 without sidelash. 



Make and Break Induction Currents as Stimuli. 

 Make a nerve-muscle preparation. Connect a 

 dry cell with simple key to the primary coil 

 (posts 1 and 2). Fasten in the posts of the 



Fig. 16. The Hat-jawed clamp and the round-jawed clamp ; one-fourth 

 the actual size. 



secondary coil the stimulation electrodes, i. e. 

 the prolongation of the ends of the secondary 

 wire which convenience demands. Put the 

 secondary coil at the end of the slideway and 

 . turn the coil. Place the 

 electrode points against 

 the nerve. Open and close 

 the primary circuit. 



Fig. 17. The double clamp, one- ml j 



third the actual size. The HlUSCle d06S not 



contract. 



Move the secondary towards the primary coil, 

 opening and closing the primary circuit. 



