170 INJUEY, RECOVERY, AND DEATH 



73. The lower curve shows that after I8I/2 hours the 

 resistance of the tissue has dropped to 10% (the death 



901% 



.o6n 



Fig. 73.— Curves showing antagonism between NaCl and nicotine. Ordinates represent 

 net electrical resistance of Laminaria agardhii (expressed as per cent, of the normal) ; absciBSse 

 represent concentrations of nicotine added to 0.52 M NaCl. The resistance of the control 

 at 18^ hours was 94%. Average of two experiments; probable error of the mean less than 



3% of the mean. 



point) in 0.52 M NaCl, as well as in 0.52 M NaCl to which 

 sufficient nicotine has been added to make the concentra- 

 tion 0.01 M. In NaCl 0.52 M plus nicotine 0.002 M the 

 resistance has dropped to 49.5% {i.e., the tissue is about 



