86 
PROF. H. A. WILSON ON THE ELECTRICAL CONDUCTIVITY AND 
CsCl and KbCl. The straight lines are those given by the equation y — b + ac. The 
crosses representing the experimental results fall nearly on the straight lines. Fig. 8 
and fig. 9 show the same thing for K 2 C0 3 and NaCl. In the case of NaCl the 
straight line passes practically through the origin but with the other salts it is clear 
that this is not the case. 
The larger values of c and 
10 4 £c 
2 T 
C — 1 
are not shown. 
They 
were used to calculate the constant a and so, of course, the points representing them 
would fall on the straight lines given by y = b + ac since b becomes negligible when 
c is large. 
If a solution containing two or more salts is sprayed into the flame, then, since the 
ions from one salt can combine with the ions from the other, the conductivity should 
not be equal to the sum of the conductivities due to equal amounts of each salt alone. 
Let there be S molecules of one salt and S' of the other present per cubic 
centimetre in the flame. Let the first salt produce n positive ions per cubic 
centimetre, and the second n'. We have 
S— n — cm{n + n'+m), 
S'— n' = aV(» + »' + m), 
F = (3m (n + n r + m), 
Ac = n + n' + m. 
