MECHANISM OF PEOCESS OF DEATH 43 



sea water until a slight precipitate of Mg(0H)2 was 

 formed. When tissue was placed in this its resistance 



100.PER CENT 



HOURS 



Fia. 15. — Curve of net electrical resistance of Laminaria agardhii in 1975 c.o. sea water plus 

 48 c.c. NaOH 0.22 M {pH about 10), unbroken line, and of a control in sea water, broken 

 line. The percentages were calculated on the basis of the net resistance in sea water at the 

 besinnins of the experiment. The readings were taken at 18° C. or corrected to this figure. 

 Each curve represents a single typical experiment. 



steadily decreased, falling to 68% in about six hours. 

 (Fig. 15). Haas* has shown that in this case the pH 



• Haas, A. E. C. ( 1916, A ) . From the table given by Haas it is evident 

 that when the concentration of added IfaOH is about 0.005 M (the writer 

 used 0.0052 M) the burette reading has risen from 7.28 to about 7.33, 

 giving a pH of about 10. 



