INJURY AND RECOVERY 



107 



Proceeding in this manner witli different times of 

 exposure we obtain the series of recovery curves shown in 

 Fig. 41. The number attached to each curve denotes the 



I6OZ1 



eoOmm 



Fia. 42. — Curves showing the rise and fall of net electrical resistance in l/aminaria agardhii 

 in 0.278 M CaCla (single curve which rises and falls) and recovery in sea water (descending 

 curves). The figure attached to each recovery curve denotes the time of exposure (in min- 

 utes) to the solution of CaCls. In the recovery curves the experimental results are shown 

 by the dotted lines, the calculated results by the unbroken lines. The observed points repre- 

 sent the average of eight or more experiments. Probable error of the mean less than 10% 



of the mean. 



time of exposure to the solution of NaCl. The observed 

 results are plotted as dotted lines, the calculated values 

 as unbroken lines. 



It will be seen that the agreement is satisfactory 

 throughout. In general the greater the number of experi- 



