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 MgCl2 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 xa^nachana in Tortugas sea-water 

 of Ph 8.1 to 8.2 diluted with aerated distilled water of P„ 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. =3ea-water. d.w. =disti!led water.] 



