1915] OSTERHOUT—PERMEABILITY 319 
The writer interprets this to mean that the velocity of the 
second reaction (causing the fall in resistance) is approximately 
equal to that of the first reaction (causing a rise in resistance). 
1100 OHMS 
1100 OHMS AOD. 
900. 
700 
500 
1 2HOURS 5 10 HOURS 
Fic. 2 Fic. 3 
3-—Fig. 2, curve of electrical resistance of Laminaria saccharina in 
as °. ee Cibrokeh line) and of a control in sea water (dotted line); fig. 3, curve 
of electrical resistance of Laminaria saccharina in MnCL o. 317 M (unbroken line) and 
of a control in sea water (dotted line oF 
TABLE II 
ELECTRICAL RESISTANCE OF Laminaria saccharina; AVERAGE 
THREE EXPERIMENTS 
Time in minutes In MgCh. 0.28 M In sea water 
° 1000 1030 
10 1055 wees 
30 710 
545 eats 
120 410 1030 
All readings were taken at 18° C. 
