120 INJURY, RECOVERY, AND DEATH 



reached and that in consequence ^^ ^ 30 M (the value 

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

 value of A was taken for the subsequent calculations. 



X NaCl 

 o Ca CI2 



D SeaWatep 



400 



MINUTES 800 



Fia. 48. — Curves showing the net electrical resistance of Laminaria agardhii in NaCl 0.52 JW, 

 in CaCU 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 CaClg A^, diminished 

 to Ai 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 CaClj have been used in a variety of ways. In this 

 case we employ for the calculations the constants appro- 



