108 ON THE CALCULATION OF THE CONDUCTIVITY OF 
tude as to have a sum equal to p times the sum of the ordinates 
of the points on the curves determined by the dilutions 
(V,’ and V,’ respectively) before mixing. The value of the 
abscissa common to the two points thus determined, gives the 
concentrations of ions of both constituents in the mixture. The 
corresponding ordinate of the first curve, and that of the second 
curve multiplied by n,/n,, give the dilutions (V, and V,) of 
the constituents in the mixture. The products of the common 
value of «/V into V, and V, are the required values of «, and 
a, respectively. 
The above process will be more readily understood by refer- 
ence to the accompanying diagram. <A B is the curve whose 
abscisse are the values of @/V and whose ordinates are the 
corresponding values of V for aseries of solutions of electrolyte 1. 
If we are to determine the concentration of ions in a mixture of 
equal volumes of solutions of electrolytes 1 and 2 respectively, 
we draw the curve C D whose abscisse are the values of «/V 
and whose ordinates are 1,/n, times the corresponding values of 
V, for a sufficiently extended series of solutions of electrolyte 2. 
Let O F and F E represent the concentration of ions and the 
dilution (V,’) of the solution of electrolyte 1 which is to be 
mixed with an equal volume of a solution of electrolyte 2, and 
let O H and H G represent the concentration of ions and 
