of Gibbs's Theory of Surface' Concentration, 
da 
511 
mental value for — by simply taking the value of the 
tangent to the curve fig. 2 at the desired concentration. 
Fior. 2. 
»1 
0-1 
C3 
o-lf. OS C6 o-7 
OiL A . Sot>.GfLY«tfHOLeATE A 
05 
o/} 
Second Series. — Oil B. 
A similar series of determinations with oil B are given in 
the following table : — 
Table III.— Oil B. 
Per cent. 
Drop- 
Relative 
Tension 
Concentration. 
number. 
Tension. 
dynes/cm. 

128 
1-000 
48 
0-0312 
202 
0-633 
30-38 
0-0625 
233 
0-549 
26-35 
0-125 
317 
0-404 
19-39 
0-165 
375 
0-341 
16-37 
0-200 
417 
0-307 
1473 
0-250 
471 
0-272 
1305 
0-300 
522 
0-245 
11-76 
0-330 
531 
0-241 
11-57 
0-360 
557 
0-230 
11-04 
0-400 
568 
0-225 
10-80 
0-500 
585 
0-219 
10-51 
2 M2 
