746 Dr. S. R. Milner on the Effect of Interionic 



absence of complete knowledge, we can only assume that 

 the effect is the same as would be produced if the ions were 

 immersed in a continuous medium of s.i.c. equal to that, K, 

 of water in mass. 



Fig. 1. 



-W 'X *4 % '2 



If we do this, the same expression (3) for the virial will 

 apply if in place of (2) fo!r h we substitute the value 



7i = 



/8<7rN\i q 2 



\'6Y ) K 



10 



(4) 



To obtain the numerical value of h for a solution of given 

 concentration, let C be the concentration in gm. mols. per 

 litre, € the charge per gm. ion of a monovalent ion, then 

 substituting in (4) V = 1000/C, N = e/?,and w? = ET^/e ; we get 





