SAMUEL ERNEST POND 



823 



is closer in solutions of higher than in those of lower electrical con- 

 ductivity. The ratio of velocity with respect to conductivity is 

 nearly a constant with frog's muscle, and less constant with muscles 

 of the turtle and Limulus. 



Cm. 

 300 



•c) 



g 



O 



CQ 



& 



p. 



-^^ 



nr-l 



o 

 o 



200 



100 







0.1 0.2 03 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Ringer 



Conductivity proportional to Ring'er 



Fig. 1. Sartorius of frog in Ringer-sugar solution. Long dashes indicate 

 aerated mixtures (Table IV); short dashes, oxygenated mixtures (Table VI). 



In Fig. 1 the velocities of the contraction-wave in the sartorius 

 of the frog are plotted against the conductivities of the solutions. 



