120 INJUEY, RECOVERY, AND DEATH 



reached and that in consequence A = 30 M (the value 

 of M being that of the observed resistance less 10). This 

 value of A was taken for the subsequent calculations. 



14o J 



loo 



x NaCl 

 o CaCl 2 



D Sea Water 



D .__ D 



4oo 



MINUTES 800 



Fio. 48. Curves showing the net electrical resistance of Laminaria agardhii in NaCl 0.52 M, 

 in CaCli 0.278 M and in sea water. Unbroken line, calculated values; broken line, observed 

 values. Average of ten or more experiments; probable error of the mean less than 10% 



of the mean. 



During the subsequent exposure to CaCl 2 A diminished 

 to A l according to the formula 



- (0.0018)360 



and this value was used in calculating the fall of resist- 

 ance during the final exposure to NaCl. 



Experiments similar to those shown in Figs. 44, 45, 46, 

 47, and 48 have been made, in which mixtures of NaCl 

 plus CaCl 2 have been used in a variety of ways. In this 

 case we employ for the calculations the constants appro- 



