6 Art. 11. — K. Matsuno: 



Sn is the limiting value of a N-valent complex ion, while ß and a 

 are constants. Putting N = l in the equation (1), we obtain, 



' Log S, +« = 



or —Log Si = « 



and the equation (1) Will now ])e, 



Log Sn -1-/3 Log N- Log Sj = (2) 



or Log Sn = Log Sj — ^?LogN 



or Sn = S,xA^ (3) 



Put into words, the limiting value of a N-valent cobalt complex 

 ion is equal to one N^th of that of the monovalent ion. The value 

 of ß in the above equation can 1)e calculated from the equation, 



ß — — ^—^ — r-^ — ^ substituting the experimental data for Si and 



Sn- The author obtained /5=»4 approximately as shown by the 

 table IL 



Accordingly, putting /3 = 4 in the equation (o), the equation 

 was deduced : 



Sj,= S^x— (4) 



Namely, the limiting value of a N-valent cobalt complex ion is 

 equal to one N^th of that of monuvalent complex ion so far as 

 the cobaltammines and the arsenious sulphide sol are concerned. 

 The equation (3) could be also deduced theoretically as follows. 



In the adsorption isotherm, i.e. — = aC°, where « and n are 



constants, x, m, and C are respectively the quantity adsorbed, the 



