92 INJURY, RECOVERY, AND DEATH 



i 



It is evident from Fig. 37 that in the earlier stages 

 of the death process, recovery may be complete (i. e., the 

 normal resistance may be completely regained), but this 

 is not the case in the later stages. In other words we 

 see that as temporary injury increases, permanent injury 

 also increases. 



Another interesting aspect of the subject 18 is illus- 

 trated by the results obtained in mixtures of NaCl and 







100lPCXO~0~..o--0- -~- O" 



JO-0----0 O 



15.9 



40.48 



50 H 



80.96 



112.0 



300 600 QOOmin. 



FIG. 37. Curves showing net electrical resistance of Laminaria agardhii in NaCl 0.52 M 

 (unbroken line), and recovery in sea water (dotted lines). The figure attached to each 

 recovery curve denotes the time of exposure (in minutes) to the solution of NaCl. 



CaCl 2 . Curve C in Fig. 38 shows the behavior of tissue 

 placed in a solution containing 97.56 mols of NaCl to 

 2.44 of CaCl 2 ; its electrical resistance falling in 37.5 

 hours to 72.87% of the original value in sea water. 

 In a solution containing 85 mols of NaCl to 15 mols of 

 CaClo (Curve A) the resistance fell in the same time to 

 practically the same point (72.47%). 



When these two lots of tissue were replaced in sea 

 water they behaved differently. The resistance of the 



18 



Of. Osterhout (1920, A, B; 1921, A, B, C). 



