Equations are derived which govern the electrokinetic phenomena in a concentrated dispersion of charged spherical mercury drops in an electrolyte solution on the basis of Kuwabara's cell model. Expressions for the electrophoretic mobility and the sedimentation velocity are obtained. For the case in which the overlapping of the electrical double layers of adjacent drops is negligible, expressions for the electrical conductivity and the sedimentation potential are derived. An Onsager relation between electrophoretic mobility and sedimentation potential is also obtained.