156 INJURY, RECOVERY, AND DEATH 



velocity constants in Table X, we are able to calculate 

 the recovery curves for any solution after any length 

 of exposure. 



Lack of space prevents a tabulation of the observed 



100. 



Fio. 68. Curves showing the net electrical resistance (descending curve) of Laminaria 

 agardhii in a mixture containing 97.56 mols of NaCl to 2.44 mols of CaCh and recovery in sea 

 water (ascending curves). The figure attached to each recovery curve denotes the time of 

 exposure to the toxic solution. In the recovery curves the experimental results are shown by 

 the broken lines, the calculated results by the unbroken lines. The observed points represent 

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



the mean. 



and calculated values, but it is possible to exhibit graphi- 

 cally the data for three mixtures and for this purpose 

 one in which recovery consists in a rise of resistance (Fig. 

 68), one in which it shows a moderate fall (Fig. 69), and 



120 



too 



75 



O - 



1000 



v 20OP, , 

 MINUTES 



FIQ. 69. Curves showing the net electrical resistance (curve which ascends and descends) 

 of Laminaria agardhii in a mixture containing 95.24 mols of NaCl to 4.76 mols of CaCh and 

 recovery in sea water (descending curves). The figure attached to each recovery curve 

 denotes the time of exposure to the toxic solution. In the recovery curves the experimental 

 results are shown by broken lines, the calculated results by unbroken lines. The observed 

 points represent the average of six or more experiments. Probable error of the mean less 



than 10% of the mean. 



one showing a very decided fall (Fig. 70) are presented. 

 In general the agreement between observation and calcu- 

 lation is satisfactory for all the solutions employed in 

 the investigation. 



