STUDIES ON EXOSMOSIS 
487 
of the distilled water to a degree dependent on the concentration and 
molecular conductivity of the salt solution used, and will be absent 
in the control experiment, in which distilled water takes the place 
of a salt solution. 
It is possible, however, to determine the duration of this diffusion, 
and by comparing the rate of change of conductance subsequent to 
its practical completion to gain an insight into the effect of salts on 
exosmosis from the protoplasm. Tissue which has been treated with 
jj 50 4 J 60 <jO IZO ISoMinutej. 
Fig. 2. 
distilled water for twenty-four hours has practically ceased to give off 
electrolytes to the distilled water. If such tissue be treated with 
salt solutions, as described above, it will be found that after thirty 
minutes the rate of change of conductance parallels that found for 
the same material treated with distilled water. This fact is apparent 
from the data in Table i, and is represented graphically in Figure 2, 
