48 



INJURY, RECOVERY, AND DEATH 



result of such an experiment with CaCL is shown in Fig. 

 19. It will be observed that while the resistance of 



La CNO 3 ) 3 



250 



500 



MINUTES 



FIG. 20. Curves showing the net electrical resistance of Laminaria agardhii in solutions of 

 the same conductivity as sea water, i.e., in La(NOs)3 about 0.126 M , CaCta 0.278 M., MnClt 

 about 0.317 M, MgCh about 0.28 M and in NaCl 0.52 M. The curves for La(NOa) 3 , MnCh 

 and MgCh represent single typical experiments (all readings were taken at 18 C. or cor- 

 rected to this temperature) ; the curves for CaCh and NaCl represent the averages of six or 

 more experiments; probable error of the mean less than 10% of the mean (all readings were 

 taken at 18 C. or corrected to this temperature). 



the living tissue increases 17 to 109.2% that of the dead 



17 The temporary fall at the start is due to the increased conductivity of 

 the solution contained in the apparatus and in the cell walls. 



