118 INJURY, EECOVERY, AND DEATH 



During the exposure of 60.6 minutes to NaCl the value 

 of A changes from A, to A, = A,e -(o.oi8)6o.6^ 



X NaCl 

 o CaClz 

 □ Sea Water 



Q 400 MINUTES 800 



Fig. 47. — Curves showing the net electrical resistance of X^minaria 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 S (by means of formula (3)) 

 we must remember that during the 91.8 minutes in CaCl2 

 the value of B (which at the start is jB ^ = 1041.77) dimin- 

 ishes from jRq to jRi according to the formula 



Kfl in CaCla = 0.012532 (See Table V, page 98). Dur- 



