118 INJURY, RECOVERY, AND DEATH 



During the exposure of 60.6 minutes to NaCl the value 

 of A changes from A, to A 2 = A,e -f 



5o- 



x NaCl 

 o Ca C 1 2 



a Sea Water 



- a 



4OO 



MINUTES 8OO 



FIG. 47. Curves showing the net electrical resistance of Laminaria agardhii in NaCl 0.52 M, 

 in CaCh 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. 



This value must be substituted for A in formula (7) in 

 calculating the recovery in sea water. 



In finding the value of 8 (by means of formula (3)) 

 we must remember that during the 91.8 minutes in CaCl 2 

 the value of R (which at the start is R Q = 1041.77) dimin- 

 ishes from R to R 1 according to the formula 



-91.8KR 



K R in CaCl 2 = 0.012532 (See Table V, page 98). Dur- 



