A two-structure model for electrolytic solutions.

In the article entitled "A Two-Structure Model for Electrolytic Solutions," by M. H. Lietzke, R. W. Stoughton, and R. M. Fuoss, which appeared in the January 1968 issue of these PROCEEDINGS (vol. 59, pp. 39-45), the following correction, called to our attention by Professor R. P. Mitra (University of Delhi), should be made. The statistical factor of one half was omitted in equation (15); A should be replaced by A/2 in equations (15) and (17)-(19). Then the value of A obtained from the slope of the line of Figure 1 is 1.76, which is the Madelung constant for the NaCl crystal. If, therefore, the derivation of B' by equations (15)-(19) is inserted to follow equation (7), with the assumption that A equals the Madelung constant, equation (8) is reduced to a 2-parameter equation.