Stiles and Jergensen.—Studies in 
Permeability 8 
//. 
Temp. 
SO°C. 
Increase of 
E.M.F. in volts. 
Relative Concentration 
Relative quantity 
Ti?ne in hours. 
(C) of Hydrogen Ion 
in Solution. 
of Hydrogen Ion 
absorbed. 
-Log. ( 
0*0 
O'O 
1*000 
0*0 
0*0 
r*o 
0*0105 
0*649 
o- 35 i 
0*188 
1*0 
0*0117 • 
0*619 
0.381 
0*208 
2*0 
0*0205 
0*430 
0*570 
0*366 
2*0 
0*0219 
0*407 
o -593 
0*390 
3-0 
0*0276 
0*321 
0*679 
o *494 
3.0 
0*0269 
0-331 
0*669 
0*480 
4 -o 
0*0399 
0 194 
0*806 
0*712 
4 *o 
0*0421 
0*177 
0*823 
0*752 
5’0 
0*0442 
0*162 
0*838 
o -792 
5 *o 
0*0513 
0*121 
0*879 
0*917 
Temp. 3o°C. 
Time in hours. 
Increase of 
E.M.F. in volts. 
Relative Concentration 
[C] of Hydrogen Ion 
in Solution. 
Relative quantity 
of Hydrogen Ion 
absorbed. 
-Log. ( 
0*0 
0*0 
1*000 
0*0 
0*0 
o -5 
0*0102 
0*667 
o -333 
0*176 
0*5 
0*0140 
0*581 
° , 4 I 9 
0*236 
1*0 
0*0232 
00 
os 
CO 
b 
0*602 
0*400 
1*0 
0*0200 
°* 4 I 7 
0-583 
0*380 
2*0 
0*0418 
0*190 
o*8io 
0*721 
2-0 
0*0425 
0*185 
0*815 
o -733 
3 ’° 
0*0660 
0*0770 
0*923 
i*H4 
3.O 
0*0720 
0*0751 
0*925 
1*124 
Fig. 3. For explanation see text. 
The curves shown in Fig. 3 exhibit graphically the relation between 
the time the absorption has proceeded and the quantity of acid left in 
the solution at that time. All the curves strongly resemble exponential 
S s 
