Nerve-Conduction in Cassiopea Xamachana,. 



19 



be a function of the electrical conductivity of the conducting tissue and 

 of the electrolytic solution surrounding the nerve. It is found, however, 

 that the rate of nerve-conduction is practically identical, whether we 

 dilute sea- water with 0.415 molecular MgCU or with distilled water- 

 in other words, whether we maintain a practically constant electrical 

 conductivity or reduce it in nearly the same ratio as the dilution. 



Table 7, illustrated by figure 14, shows rates of nerve-conduction in 

 the subumbrella tissue of Cassiopea xamachana in Tortugas sea-water 

 of P H 8.1 to 8.2 diluted with aerated distilled water of P H about 

 8.0 at 29 C. The rate in pure sea-water at the same temperature 

 as the diluted sea-water is assumed to be 100. The experiments were 

 conducted at Tortugas, Florida, on July 4 to 11 and July 19 to 25, 1916. 



TABLE 7. 

 [s.w. = sea-water, d.w. = distilled water.] 



