42 



INJUEY, RECOVERY, AND DEATH 



the addition of alkali to sea water produces a precipitate 

 of Mg(0H)2 the experiments were made by adding vari- 



100 FEB CENT OP CONTROL 



03 M WjiOE 



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

 Jtf +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. CaCls 0.279 M. The results are shown 

 in Figs. 13 and 14. 



Experiments were also made by adding alkali to the 



