42 INJURY, RECOVERY, AND DEATH 



the addition of alkali to sea water produces a precipitate 

 of Mg(OH) 2 the experiments were made by adding vari- 



100 PER CENT OF CONTROL 



90 



80 



60 



.01 



.02 



03 M 



FIG. 14. Curves of net electrical resistance of Laminaria agardhii in 1793 c.c. NaCl 0.52 

 M +207 c.c. 0.279 M containing various amounts of NaOH. The abscissae represent the 

 concentration of NaOH in the solution: the ordinates represent the percentage of electrical 

 net resistance calculated on the basis of the net resistance of the control. All readings 

 were taken at 18 C. or corrected to this temperature. Each curve represents a single 



typical experiment. 



ous amounts of NaOH to a mixture of 1793 cc. NaCl 

 0.52 M + 207 cc. CaCl 2 0.279 M. The results are shown 

 in Figs. 13 and 14. 



Experiments were also made by adding alkali to the 



