Hind . — Studies in Permeability . III. 
231 
Acetic Acid. 
Series 9 and 10. — The next acid of the series, acetic acid, was used in 
N N N N 
concentrations — , , , , It will be observed from Fig. 8 
500 1000 2000 5000 & 
that the conductivity of the external solution changes in the same way as 
in the case of formic acid. 
In Fig. 9 is shown the rate at which the hydrogen ion is absorbed by 
N 
potato tissue from acetic acid. The curious rise in concentration of 
1000 
the hydrogen ion, after a few hours of continuous decrease, is shown again 
here, as in the case of formic acid. 
R 2 
