56 



CONTRIBUTION TO THE 



T 2 = the intervals during which the current remained open ; C = 

 the size of the break-contraction. 



The muscle traced its contractions by means of a spring lever on 

 the cylinder of Marcy's registering apparatus, which moved with 

 the greatest regularity. They were magnified about 3*5 times. The 

 electrodes used were, of course, unpolarisable. 



Experiment I. 2 Meidingers, 500 rheochord-units in the deri- 

 vation circuit ; current ascending. 



