1225 



Remainiiig in the cai-bonic tifiil the muscle gives at intervals of 

 10' a summation of 0.046, 0.036, 0.035 and 0. Five .minutes after, 

 at a stimulus-interval of 0.0089" the degree of summation is 0.009. 

 After 65', at an interval of 0.01 J 5", the summation amounts to 

 0.019; ten minutes later it is at tins distance 0, for an interval of 

 0.0136" 0.015, for one of 0.0168" 0.03. 40 minutes after, after 115' 

 the degree of summation becomes also for this distance. 

 The values of the other experiments are the following: 



